information systems security engineer

Galapagos Federal Systems

<div>Overview:

Job Summary 
Galapagos Federal Systems LLC is seeking a highly skilled and proactive Information Systems Security Engineer (ISSE) to support the United States Space Force (USSF). This role offers a unique opportunity to contribute directly to national security and the advancement of mission-critical space operations. 
The ISSE supports cybersecurity efforts across classified environments, ensuring the secure development, integration, and sustainment of advanced test and training systems essential to space mission readiness. 
The ideal candidate brings a strong understanding of DoD and Intelligence Community (IC) cybersecurity standards, solid technical expertise, and effective communication skills. Success in this role requires the ability to operate in a dynamic, high-tempo, mission-focused environment while collaborating across technical and operational teams. 
Key Responsibilities 
The Information Systems Security Engineer will:<ul><li>
Perform risk identification and assessment activities in support of system and enclave change management processes</li><li>
Develop and oversee information system security policies, procedures, and implementation guidelines</li><li>
Support and ensure availability of resources for Cyber Security Service Provider (CSSP) functions, including vulnerability assessments, remediation, and endpoint protection</li><li>
Conduct and coordinate security testing and evaluations using intrusion detection, monitoring, and assessment tools to validate system security posture</li><li>
Identify, document, and track security vulnerabilities within POA&amp;Ms, SARs, and RARs, ensuring proper reporting and escalation of critical issues to the Authorizing Official (AO)/Designated Approving Official (DAO)</li><li>
Support continuous monitoring activities and ensure systems maintain compliance with RMF security controls</li><li>
Develop and execute security test plans and procedures to validate system compliance and performance requirements</li><li>
Support Assessment and Authorization (A&amp;A) activities, including development and maintenance of ATO and IATT packages</li><li>
Author and maintain System Security Plans (SSPs) and other required cybersecurity documentation</li><li>
Coordinate with stakeholders, including AOs, SCAs, and configuration management authorities, to support system security and accreditation efforts</li></ul>
Responsibilities:

Skills and Experience 
The Information Systems Security Engineer must have:<ul><li>
Active Top Secret/SCI clearance</li><li>
5+ years of cybersecurity experience supporting DoD and/or Intelligence Community (IC) environments</li><li>
Experience implementing and supporting the Risk Management Framework (RMF) for mission-critical systems</li><li>
Proven ability to implement IT security controls to ensure confidentiality, integrity, and availability of systems and data</li><li>
Strong experience in vulnerability management, including POA&amp;M development, tracking, and remediation coordination</li><li>
Experience managing Security Control Traceability Matrices (SCTMs) and working with Authorizing Officials (AOs) and Security Control Assessors (SCAs)</li><li>
Demonstrated experience supporting Assessment &amp; Authorization (A&amp;A) processes, including development of ATO and IATT packages</li><li>
Experience developing and executing security testing and validation procedures</li><li>
Experience authoring and maintaining System Security Plans (SSPs) and related cybersecurity documentation</li><li>
Strong analytical and systems engineering skills, with the ability to assess architectures and recommend security improvements</li><li>
Ability to effectively communicate cybersecurity concepts, including developing documentation and delivering technical briefings to stakeholders</li><li>
Strong organizational and multitasking skills, with the ability to manage multiple priorities in a dynamic environment</li><li>
Ability to work independently and collaboratively within cross-functional and distributed teams</li><li>
Commitment to maintaining DoD cybersecurity certifications and staying current with evolving security requirements</li></ul>
Education and Certifications 
The Information Systems Security Engineer must meet the following: 
Required<ul><li>
BS degree in Information Technology, Cybersecurity, Data Science, Information Systems, or Computer Science, from an ABET accredited or CAE designated institution</li><li>
One or more of the following Security+, CISSO, CISSP, CISSP-ISSMP, or equivalent military training/certification</li></ul>
Preferred<ul><li>
One or more of the following : CCSP, CGRC/CAP, CASP+, Cloud+, SSCP, GSEC, CISM, CISSO, CISSP, CISSP-ISSMP, GCIA, GCSA, GSLC, CGIH, or FITSP-M&mdash;or equivalent military training/certification</li></ul>
Benefits<ul><li>
Medical, dental, vision, disability, and life insurance</li><li>
Flexible Spending Accounts</li><li>
401(k)</li><li>
PTO</li><li>
Paid Paternal leave</li><li>
Tuition reimbursement</li><li>
Paid federal holidays</li></ul>
Security Clearance 
Must be a U.S. Citizen. A high-level Department of Defense active security clearance is/may be required. Applicants selected will be subject to a security investigation and may need to meet eligibility requirements for access to government information. 
Physical Requirements 
Work may involve sitting or standing for extended periods of time and typing and reading from a computer screen. The candidate must have enough mobility, including bending, reaching, and kneeling, to complete daily duties in a prompt and efficient manner and that may include lifting to thirty pounds, as necessary. 
Company Summary 
Headquartered in Hawaii, Galapagos Federal Systems, LLC, is an SBA-Certified NHO-owned 8(a) Small Business specializing in global information technology solutions. We deliver professional services in IT Design &amp; Installation, Cybersecurity Engineering &amp; Support, Application Integration &amp; Development, Software &amp; Hardware Engineering, Network &amp; Systems Management, Information Systems Security, and Business Management Services. 
Leveraging over 30 years of experience supporting both federal and commercial markets, our team brings innovative expertise to complex IT challenges, delivering solutions across the globe.
Galapagos Federal Systems, LLC is an equal opportunity employer. 
Our service commitment is simple: &quot;Quality IT Solutions... On Time &amp; On Budget.&quot; 
Company Employment Statement 
Galapagos Federal Systems, LLC reserves the right to change or modify job duties and assignments at any time. The above job description is not all encompassing as positions, functions, and qualifications may vary depending on business needs. Reasonable accommodation may be made to enable individuals with disabilities to perform the essential functions. 
Galapagos Federal Systems, LLC is an equal opportunity employer and does not discriminate against applicants based on race, color, creed, religion, medical condition, legally protected genetic information, national origin, sex (including pregnancy, childbirth, or related medical condition), sexual orientation, gender identity and expression, age, disability, or Vietnam era, or other eligible veteran status or legally protected characteristics.
Posted Salary Range: USD $140,000.00 - USD $150,000.00 /Yr.</div>

Information Systems Security Engineer

Booz Allen Hamilton

<div>Information Systems Security Engineer
The Opportunity:
Cyber threats are everywhere, and the constantly evolving nature of these threats can make understanding them seem overwhelming to the Department of War (DoW). In all of this &ldquo;cyber noise&rdquo;, how can these organizations understand their risks and how to mitigate them? The answer is an Information Systems Security Engineer like you who can break down complex threats into manageable plans of action.
That&rsquo;s why we need you, an Information Systems Security Engineer who understands what &ldquo;No-Fail&rdquo; means. You operate with extreme ownership and demonstrate full accountability for outcomes, proactively identifying problems, driving solutions, and ensuring completion without reliance on external direction. You take personal responsibility for mission success, team performance, and deliverable quality, owning both successes and failures. You&rsquo;ll anticipate risks, remove obstacles, and act decisively to close gaps before they impact schedule, cost, or performance. You&rsquo;ll operate with a &ldquo;no excuses&rdquo; mindset while maintaining professional humility and continuous improvement. Elevate team effectiveness by taking initiative beyond assigned responsibilities to support mission objectives.
Work with us as we protect our nation's cyber infrastructure!
Join us. The world can&rsquo;t wait.
You Have:<ul><li>
3+ years of experience implementing the Assessment and Authorization (A&amp;A) process under Risk Management Framework (RMF) for new and existing information systems</li><li>
3+ years of experience reviewing assessment reports and assisting projects in identifying security risks, including technical and non-technical, and developing effective mitigation strategies, including Plan of Action and Milestones</li><li>
Experience with manual and automated vulnerability assessments for vulnerability management tools, such as Nessus Vulnerability Scanner</li><li>
Experience developing test plans and procedures to address the level of effort for the IT system being accredited, and developing technical system requirements</li><li>
Knowledge of NIST SP 800-53 Security and Privacy Controls, DoD cybersecurity policies, FISMA, or FEDRAMP</li><li>
Knowledge of SCAP, STIG, and hardening implementation</li><li>
TS/SCI clearance</li><li>
HS diploma or GED</li><li>
DoD 8570 IAT or IAM Level II Certification</li></ul>
Nice If You Have:<ul><li>
Experience with SIEM tools, Splunk, monitoring operating systems security events, such as Windows or Linux, and networking protocols, such as TCP/IP, DNS, DHCP, or HTTP and HTTPS</li><li>
Experience working with cloud providers, including Amazon Web Services (AWS)</li><li>
DoD 8570 IAT or IAM Level III Certification</li></ul>
Clearance:
Applicants selected will be subject to a security investigation and may need to meet eligibility requirements for access to classified information; TS/SCI clearance is required.
Compensation
At Booz Allen, we celebrate your contributions, provide you with opportunities and choices, and support your total well-being. Our offerings include health, life, disability, financial, and retirement benefits, as well as paid leave, professional development, tuition assistance, work-life programs, and dependent care. Our recognition awards program acknowledges employees for exceptional performance and superior demonstration of our values. Full-time and part-time employees working at least 20 hours a week on a regular basis are eligible to participate in Booz Allen&rsquo;s benefit programs. Individuals that do not meet the threshold are only eligible for select offerings, not inclusive of health benefits. We encourage you to learn more about our total benefits by visiting the Resource page on our Careers site and reviewing Our Employee Benefits page.
Salary at Booz Allen is determined by various factors, including but not limited to location, the individual&rsquo;s particular combination of education, knowledge, skills, competencies, and experience, as well as contract-specific affordability and organizational requirements. The projected compensation range for this position is $61,900.00 to $141,000.00 (annualized USD). The estimate displayed represents the typical salary range for this position and is just one component of Booz Allen&rsquo;s total compensation package for employees. This posting will close within 90 days from the Posting Date.
Identity Statement
As part of the application process, you are expected to be on camera during interviews and assessments. We reserve the right to take your picture to verify your identity and prevent fraud.
Work Model 
Our people-first culture prioritizes the benefits of flexibility and collaboration, whether that happens in person or remotely.<ul><li>
If this position is listed as remote or hybrid, you&rsquo;ll periodically work from a Booz Allen or client site facility.</li><li>
If this position is listed as onsite, you&rsquo;ll work with colleagues and clients in person, as needed for the specific role.</li></ul>
Commitment to Non-Discrimination
All qualified applicants will receive consideration for employment without regard to disability, status as a protected veteran or any other status protected by applicable federal, state, local, or international law.</div>

MANTECH

<div>MANTECH seeks a motivated, career and customer-oriented Information Systems Security Engineer to join our team onsite in Norfolk, Virginia.
In this role you will support our US Navy customer with RMF package development and maintaining compliance throughout the RMF lifecycle
Responsibilities include but are not limited to:<ul><li>
Develop cybersecurity best practices, plans and procedures to support assessment &amp; authorization (A&amp;A) efforts for Navy Enterprise Tactical Training Network (NETTN) enclaves and systems.</li><li>
Provide hardware and software configuration baseline updates for NETTN enclaves systems as well as Navy Training Baseline (NTB) software configuration deliveries.</li><li>
Work with RMF Package escalation process and procedures.</li><li>
Work with Enterprise Mission Assurance Support Service (eMASS) plan of action and milestones (POA&amp;Ms) for ongoing and closed findings.</li></ul>
Minimum Qualifications:<ul><li>
A Bachelors degree with a 5+ years of experience in developing and/or supporting a large US Navy program or 10+ years of experience in lieu of degree.</li><li>
Experience working with Defense Information Assurance Certification and Accreditation Process (DIACAP), Risk Management Framework (RMF), National Institute Standards and Technology (NIST), and other federal guidelines.</li><li>
Computing Environment/Operating System (CE/OS) certifications (Preferably VMware, Linux and/or Microsoft Windows 2022)</li><li>
DoD Information Assurance Technician (IAT)-I level Certification or above.</li><li>
Ability to travel in CONUS as needed up to Up to 25%</li></ul>
Preferred Qualifications:<ul><li>
Experience utilizing assessment tools (e.g., ACAS, SCAP, HBSS) and RMF process tools (e.g., MCCAST, eMASS, eArcher, VRAM and DITPR-DON/DADMS) preferred.</li><li>
CISSP certifications</li></ul>
Clearance Requirements:<ul><li>
Must be a US Citizenship with an active TS/SCI clearance.</li></ul>
Physical Requirements:<ul><li>
Must be able to remain in a stationary position 50%.</li><li>
Constantly operates a computer and other office productivity machinery, such as a calculator, copy machine and computer printer.</li><li>
The person in this position needs to occasionally move about inside the office to access file cabinets, office machinery, etc</li></ul></div>

<div>Zero Trust Information Systems Security Engineer
The Opportunity:
Are you looking for an opportunity to share your experience in system security engineering to help our country and assist our clients with critical missions? As a systems security and network security engineer, you can identify the information system security engineering needed to assess vulnerabilities and recommend the best solution and security strategy. We need your experience to lead the development and implementation of security solutions that will protect our military.
On our team, you&rsquo;ll troubleshoot and analyze complex challenges for customers using your knowledge of network and security devices, applications, and identifying tools. You&rsquo;ll use your curiosity for technology and market trends to further research and develop security solutions. Using your knowledge and experience in cybersecurity, you&rsquo;ll assess security threats and implement infrastructure controls.
In this role, you&rsquo;ll closely impact the DoD by protecting their infrastructure. With mentoring, challenging hands-on problem-solving, and opportunities to learn new tools and skills, we focus on growing as a team to make the best solutions for our customers.
Work with us as we secure and protect critical AI or ML networks for the better.
What You&rsquo;ll Work On:<ul><li>
Design, develop, and implement automated workflows and integrations.</li><li>
Focus on safeguarding critical information systems and data against advanced cyber threats, with a primary emphasis on Zero Trust architecture, security data analytics, and robust automation.</li><li>
Leverage data analytics, visualization, and observability techniques to enhance threat detection, incident response, and security posture.</li><li>
Perform close collaboration with cross-functional teams, assist with the development of security policies, and perform continuous evaluation of security controls to ensure confidentiality, integrity, and availability of sensitive information.</li><li>
Automate security processes, integrate security into the CI/CD pipeline, and ensure compliance with DoD, Army, and Intelligence Community (IC) standards and regulations.</li></ul>
Join us. The world can&rsquo;t wait.
You Have:<ul><li>
6+ years of experience in an ISSE, ISSO, or IT role</li><li>
Experience with DoD architecture, strategic planning, concept of operations, performance attributes, system architecture and design, evolving methodologies, and statutory and regulatory requirements</li><li>
Experience with Security Information and Event Management (SIEM) systems such as Splunk, Elastic, Logstash, and Kibana</li><li>
Experience with data broker technologies such as Cribl or Confluent, operating systems security events such as Windows or Linux, and networking protocols such as TCP/IP, DNS, DHCP, HTTP, or HTTPS</li><li>
Experience with cybersecurity tools and technologies such as IDS or IPS, firewalls, host-based security, or Identity and Access Management (IDAM), and DevSecOps tools and practices such as CI/CD pipelines, including GitLab CI/CD and Azure DevOps</li><li>
Experience with programming or scripting, including with PowerShell, Ansible, Python, and automation frameworks such as Terraform, Puppet, or Chef</li><li>
Active TS/SCI clearance; willingness to take a polygraph exam</li><li>
Bachelor&rsquo;s degree</li><li>
IASAE II Certification such as CASP+, CISSP, or CSSLP Certification</li></ul>
Nice If You Have:<ul><li>
Experience with ICAM principles and technologies such as multi-factor authentication and privileged access management</li><li>
Experience with automation tools and scripting languages such as Python and PowerShell</li><li>
Knowledge of Zero Trust principles and frameworks such as NIST 800-207</li><li>
TS/SCI clearance with a polygraph</li><li>
Offensive Security Certified Professional (OSCP), GIAC Certified Incident Handler (GCIH), or GIAC Vulnerability Assessment Professional (GVAP) Certification</li></ul>
Clearance:
Applicants selected will be subject to a security investigation and may need to meet eligibility requirements for access to classified information; TS/SCI clearance is required.
Compensation
At Booz Allen, we celebrate your contributions, provide you with opportunities and choices, and support your total well-being. Our offerings include health, life, disability, financial, and retirement benefits, as well as paid leave, professional development, tuition assistance, work-life programs, and dependent care. Our recognition awards program acknowledges employees for exceptional performance and superior demonstration of our values. Full-time and part-time employees working at least 20 hours a week on a regular basis are eligible to participate in Booz Allen&rsquo;s benefit programs. Individuals that do not meet the threshold are only eligible for select offerings, not inclusive of health benefits. We encourage you to learn more about our total benefits by visiting the Resource page on our Careers site and reviewing Our Employee Benefits page.
Salary at Booz Allen is determined by various factors, including but not limited to location, the individual&rsquo;s particular combination of education, knowledge, skills, competencies, and experience, as well as contract-specific affordability and organizational requirements. The projected compensation range for this position is $77,600.00 to $176,000.00 (annualized USD). The estimate displayed represents the typical salary range for this position and is just one component of Booz Allen&rsquo;s total compensation package for employees. This posting will close within 90 days from the Posting Date.
Identity Statement
As part of the application process, you are expected to be on camera during interviews and assessments. We reserve the right to take your picture to verify your identity and prevent fraud.
Work Model 
Our people-first culture prioritizes the benefits of flexibility and collaboration, whether that happens in person or remotely.<ul><li>
If this position is listed as remote or hybrid, you&rsquo;ll periodically work from a Booz Allen or client site facility.</li><li>
If this position is listed as onsite, you&rsquo;ll work with colleagues and clients in person, as needed for the specific role.</li></ul>
Commitment to Non-Discrimination
All qualified applicants will receive consideration for employment without regard to disability, status as a protected veteran or any other status protected by applicable federal, state, local, or international law.</div>

Zero Trust Information Systems Security Engineer

Leidos

<div>Description
Lead Security Engineer
Leidos has a new and exciting opportunity for a Lead Security Engineer in our Intel Sector's Cyber &amp; Analytics Business Area (CABA). Our talented team is at the forefront in Security Engineering, Computer Network Operations (CNO), Mission Software, Analytical Methods and Modeling, Signals Intelligence (SIGINT), and Cryptographic Key Management. At Leidos, we offer competitive benefits, including Paid Time Off, 11 paid Holidays, 401K with a 6% company match and immediate vesting, Flexible Schedules, Discounted Stock Purchase Plans, Technical Upskilling, Education and Training Support, Parental Paid Leave, and much more. Join us and make a difference in National Security!
Job Summary
Leidos is seeking a Lead Security Engineer to support a mission-critical program, offering a challenging and rewarding opportunity for a hands-on technical leader in the security domain. The selected individual will lead all security engineering efforts for a large, complex network environment with geographically distributed systems; and will manage a team of Information Systems Security Officers (ISSOs) and Information Systems Security Engineers (ISSEs), providing technical leadership and direction to meet program requirements. The selected individual will mentor the team in sound information systems security engineering practices and will be heavily involved in system testing. The selected candidate will work closely with other engineers and technical experts to enhance operational, test, integration, and development environments. Responsibilities include ensuring and maintaining Authorizations to Operate (ATOs) for all System Security Plans (SSPs), and ensuring compliance with Secure the Enterprise/Secure the Network (STE/STN) requirements.
Primary Responsibilities<ul><li>
Responsible for the overall security architecture, ensuring all security requirements are defined, implemented, and verified.</li><li>
Serve as a security subject matter expert (SME), providing guidance and oversight for the end-to-end security architecture.</li><li>
Engage with multiple system owners across multiple networks to interpret, negotiate, and refine system and security requirements.</li><li>
Define and drive security strategy, including risk assessment and management, security control assessment, continuous monitoring, service design, and broader cybersecurity program support.</li><li>
Identify and analyze security issues across complex, highly integrated systems and environments, and develop clear, actionable remediation recommendations.</li><li>
Design, develop, and execute static and dynamic application security testing, as well as penetration testing activities.</li><li>
Partner with development teams to improve understanding of vulnerabilities, attack vectors, and effective remediation techniques.</li><li>
Lead and mentor a team of program security engineers in day-to-day security engineering activities.</li><li>
Collaborate with the program security team to ensure STE/STN and continuous monitoring requirements are met for Test, Integration, and Development environments.</li><li>
Clearly articulate program security requirements, risks, and compliance challenges to multiple customer points of contact.</li><li>
Coordinate with internal cross-functional teams to plan, prioritize, and execute remediation and other security-related activities.</li></ul>
Required Qualifications<ul><li>
Master&rsquo;s degree in Information Technology, Information Assurance, or related field, and at least 15 years of relevant experience. Additional experience may be substituted for a degree.</li><li>
At least 10 years of experience leading large, diverse Security Engineering teams, leading ISSO and ISSE teams.</li><li>
Current active CISSP certification.</li><li>
Certified Scrum Master certification.</li><li>
At least 5 years of experience applying Agile methodologies in security engineering projects, including Scrum or SAFe frameworks.</li></ul><ul><li>
Extensive hands-on experience with modern security tools; hardware and software security implementation; communication protocols; encryption technologies; and web services.</li><li>
Expert-level understanding of security vulnerabilities and remediation techniques, including risk assessment, risk management, and security strategy/design.</li><li>
Extensive experience formulating, implementing, and assessing IT security policy.</li><li>
Solid understanding of ATOs, SSPs, and STE/STN requirements.</li><li>
Direct experience collaborating with software developers, software testers, and integration, deployment, and sustainment teams.</li><li>
Strong communication and interpersonal skills, with a proven ability to clearly convey program requirements and system compliance challenges to multiple customer stakeholders.</li><li>
Demonstrated ability to coordinate across multiple internal teams for planning and remediation activities.</li><li>
Solutions-oriented team player with a high level of self-initiative.</li><li>
Clearance Required: Must have TS/SCI with Polygraph.</li></ul>
Preferred Qualifications<ul><li>
Additional certification: Information System Security Engineering Professional (ISSEP)</li><li>
At least twelve years of experience with defense-in-depth principals/technology (including access control, authorization, identification and authentication, public key infrastructure, network and enterprise security architecture) and applying risk assessment methodology to system development.</li><li>
Experience developing/implementing integrated security services management processes, such as assessing and auditing network penetration tests, anti-virus planning assistance, risk analysis, and incident response.</li><li>
Experience developing/implementing integrated security services management processes, such as assessing and auditing network penetration tests, anti-virus planning assistance, risk analysis, and incident response.</li><li>
Experience providing information assurance support for application development that includes system security certifications and project evaluations for firewalls that encompass the development, design, and implementation.</li></ul>
At Leidos, the opportunities are boundless. We challenge our staff with interesting assignments that allow them to thrive professionally and personally. For us, helping you grow your career is good business. We look forward to learning more about you &ndash; apply today.
careers.leidos.com/CONMD
CSSKEY
CONMD
If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo &mdash; because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 &mdash; and moving faster than anyone else dares.<h2 class="jobSectionHeader">
Original Posting:</h2>
March 16, 2026 
For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.<h2 class="jobSectionHeader"> 
Pay Range:</h2>
Pay Range $154,050.00 - $278,475.00
The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.
About Leidos
Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $16.7 billion for the fiscal year ended January 3, 2025. For more information, visit www.Leidos.com.
Pay and Benefits
Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available at www.leidos.com/careers/pay-benefits.
Securing Your Data
Beware of fake employment opportunities using Leidos&rsquo; name. Leidos will never ask you to provide payment-related information during any part of the employment application process (i.e., ask you for money), nor will Leidos ever advance money as part of the hiring process (i.e., send you a check or money order before doing any work). Further, Leidos will only communicate with you through emails that are generated by the Leidos.com automated system &ndash; never from free commercial services (e.g., Gmail, Yahoo, Hotmail) or via WhatsApp, Telegram, etc. If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at LeidosCareersFraud@leidos.com.
If you believe you are the victim of a scam, contact your local law enforcement and report the incident to the U.S. Federal Trade Commission.
Commitment to Non-Discrimination
All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.</div>

Lead Security Engineer with TS/SCI Poly

<div>Description
Leidos has a new and exciting opportunity for a Lead Security Engineer in our Intel Sector's Cyber &amp; Analytics Business Area (CABA). Our talented team is at the forefront in Security Engineering, Computer Network Operations (CNO), Mission Software, Analytical Methods and Modeling, Signals Intelligence (SIGINT), and Cryptographic Key Management. At Leidos, we offer competitive benefits, including Paid Time Off, 11 paid Holidays, 401K with a 6% company match and immediate vesting, Flexible Schedules, Discounted Stock Purchase Plans, Technical Upskilling, Education and Training Support, Parental Paid Leave, and much more. Join us and make a difference in National Security!
Job Summary
Leidos is seeking a Lead Security Engineer to join a high-impact, multi-agency program serving the United States Space Force (USSF) / Space Systems Command (SSC), the United States Air Force (USAF), and other critical mission stakeholders. The selected individual will play key role in enhancing, testing, and deploying a large-scale Satellite Communications (SATCOM) system to an existing infrastructure. The ideal candidate brings deep expertise in public key infrastructure (PKI) and key management, excels at complex problem solving, and has a strong record of delivering results as part of a high-performing team in a fast-paced Agile Development environment. This position offers a unique opportunity to enhance the resilience and cybersecurity of mission-critical communications that protect our nation.
Join a team where your &quot;greatest work&quot; isn't just a slogan&mdash;it&rsquo;s our daily standard.<ul><li>
This position is based near Columbia, Maryland, with possible alternative duty locations in San Diego, California, Englewood, Colorado, or Huntsville, Alabama. Relocation assistance may be available for qualified candidates.
</li></ul>The Lead Systems Engineer is responsible for the overall security architecture, ensuring all security requirements are defined, implemented, and verified. She/he oversees all security engineering activities for a complex network environment with geographically distributed systems. The selected individual will manage a team of Information Systems Security Officers (ISSOs) and Information Systems Security Engineers (ISSEs), providing technical leadership and direction to meet program security requirements. She/he will mentor the team in sound information systems security engineering practices, play a key role in system testing, and work closely with other engineers and technical experts to enhance operational, test, integration, and development environments. Responsibilities include obtaining and maintaining Authorizations to Operate (ATOs) for all System Security Plans (SSPs) and ensuring ongoing compliance with Secure the Enterprise/Secure the Network (STE/STN) requirements.
Primary Responsibilities:<ul><li>
Serving as a security subject matter expert (SME), providing guidance and oversight for the end-to-end security architecture.
</li><li>Engaging with multiple system owners across multiple networks to interpret, negotiate, and refine system and security requirements.</li><li>
Defining and driving security strategy, including risk assessment and management, security control assessment, continuous monitoring, service design, and broader cybersecurity program support.</li><li>
Identifying and analyzing security issues across complex, highly integrated systems and environments, and develop clear, actionable remediation recommendations.</li><li>
Designing, developing, and executing static and dynamic application security testing, as well as penetration testing activities.</li><li>
Partnering with development teams to improve understanding of vulnerabilities, attack vectors, and effective remediation techniques.</li><li>
Leading and mentoring program security engineers in day-to-day security engineering activities.</li><li>
Collaborating with the program security team to ensure STE/STN and continuous monitoring requirements are met for Test, Integration, and Development environments.</li><li>
Clearly articulating program security requirements, risks, and compliance challenges to multiple customer points of contact.</li><li>
Coordinating with internal cross-functional teams to plan, prioritize, and execute remediation and other security-related activities.</li></ul>
Basic Qualifications:<ul><li>
Bachelor of Science degree in Information Technology, Information Assurance, or related field, and at least 12 years of relevant experience. Additional experience may be substituted for a degree.</li><li>
At least 10 years of experience leading diverse Security Engineering teams including ISSO and ISSE teams.</li><li>
At least 5 years of experience working on an Agile program in a leadership role.</li><li>
Extensive hands-on experience with modern security tools; hardware and software security implementation; communication protocols; encryption technologies; and web services.</li><li>
Current active CISSP certification. * In-depth understanding of security vulnerabilities and remediation techniques, including risk assessment, risk management, and security strategy/design.</li><li>
Extensive experience formulating, implementing, and assessing IT security policy.</li><li>
Solid understanding of ATOs, SSPs, and STE/STN requirements.</li><li>
Direct experience collaborating with software developers, software testers, and integration, deployment, and sustainment teams.</li><li>
Strong communication and interpersonal skills, with a proven ability to clearly convey program requirements and system compliance challenges to multiple customer stakeholders.</li><li>
Demonstrated ability to coordinate across multiple internal teams for planning and remediation activities.</li><li>
Solutions-oriented team player with a high level of self-initiative.
</li></ul>Clearance Required
U.S. Citizenship with an Active or Current TS/SCI with Polygraph required.
Preferred Qualifications:<ul><li>
Experience working with or in military Satellite Communications (SATCOM) organizations such as United States Air Force (USAF), United States Space Force (USSF), or another Agency.</li><li>
Experience working with Public Key Infrastructure (PKI)/ key management programs and technologies.</li><li>
Certified Scrum Master certification.</li><li>
Experience in performing STIG analysis and remediation.</li><li>
At least twelve years of experience with defense-in-depth principals/technology (including access control, authorization, identification and authentication, public key infrastructure, network and enterprise security architecture) and applying risk assessment methodology to system development.</li><li>
Experience developing/implementing integrated security services management processes, such as assessing and auditing network penetration tests, anti-virus planning assistance, risk analysis, and incident response.</li><li>
Experience developing/implementing integrated security services management processes, such as assessing and auditing network penetration tests, anti-virus planning assistance, risk analysis, and incident response.</li><li>
Experience providing information assurance support for application development that includes system security certifications and project evaluations for firewalls that encompass the development, design, and implementation.</li></ul>
At Leidos, the opportunities are boundless. We challenge our staff with interesting assignments that allow them to thrive professionally and personally. For us, helping you grow your career is good business. We look forward to learning more about you &ndash; apply today.
If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo &mdash; because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 &mdash; and moving faster than anyone else dares.<h2 class="jobSectionHeader">
Original Posting:</h2>
March 13, 2026 
For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.<h2 class="jobSectionHeader"> 
Pay Range:</h2>
Pay Range $131,300.00 - $237,350.00
The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.
About Leidos
Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $16.7 billion for the fiscal year ended January 3, 2025. For more information, visit www.Leidos.com.
Pay and Benefits
Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available at www.leidos.com/careers/pay-benefits.
Securing Your Data
Beware of fake employment opportunities using Leidos&rsquo; name. Leidos will never ask you to provide payment-related information during any part of the employment application process (i.e., ask you for money), nor will Leidos ever advance money as part of the hiring process (i.e., send you a check or money order before doing any work). Further, Leidos will only communicate with you through emails that are generated by the Leidos.com automated system &ndash; never from free commercial services (e.g., Gmail, Yahoo, Hotmail) or via WhatsApp, Telegram, etc. If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at LeidosCareersFraud@leidos.com.
If you believe you are the victim of a scam, contact your local law enforcement and report the incident to the U.S. Federal Trade Commission.
Commitment to Non-Discrimination
All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.</div>

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