Information Systems Security Engineer (ISSE)

Information Systems Security Engineer (ISSE)

Full-time San Antonio, TX

Active Top Secret/SCI clearance

Referral bonus: $1,000

Job Description:

The Digital Modernization Sector is seeking an experienced Information Systems Security Engineer (ISSE) to support the USAF Defensive Cyber Systems Program Management Office (PMO) at Joint Base San Antonio.

This role directly supports the Information Assurance (IA) team by engineering, integrating, and maintaining cybersecurity solutions that enable and sustain multiple Authority to Operate (ATO) authorizations. The ISSE will focus on building systems, pipelines, and processes that collect, generate, and validate required RMF artifacts, reducing manual effort and accelerating authorization timelines.

The ideal candidate is a hands-on cybersecurity engineer with strong experience in vulnerability management, STIG compliance, automation, and system integration across Windows, Linux, and containerized environments. This role bridges the gap between engineering and authorization, ensuring systems are both secure and audit ready.

Primary Responsibilities:

• Design, build, and maintain technical solutions that support RMF and ATO artifact generation and validation
• Directly support multiple ATO, IATT, and continuous monitoring efforts across the program
• Engineer and maintain automated workflows for:
• • Vulnerability data collection (ACAS/Nessus)
  • STIG compliance validation (SCAP, SCC, STIG Viewer, STIG checklists)
  • Artifact generation for eMASS submission
• Execute and analyze vulnerability scans using ACAS (Tenable.sc / Nessus) and integrate results into RMF workflows
• Perform SCAP and SCC scans in both connected and isolated environments
• Develop and maintain STIG checklists and support automated evaluation using tools such as STIG Viewer and Evaluator
• Translate scan results into actionable findings, POA&Ms, and risk decisions
• Support and maintain eMASS documentation, including:
• • Control implementations
  • Artifact uploads
  • Continuous monitoring updates
• Build and maintain automation scripts using:
• • Python
  • Bash
  • PowerShell
• Engineer solutions across:
• • Windows and Linux (RHEL-based systems)
  • Virtual environments (vSphere/ESXi)
  • Containerized platforms (Kubernetes, Spectro Cloud or similar)
• Collaborate with IA, ISSOs, system engineers, and developers to:
• • Ensure systems are designed for compliance from the start
  • Reduce rework during ATO cycles
• Support IAVM tracking, vulnerability prioritization, and reporting
• Identify opportunities to automate manual RMF processes and improve efficiency across teams
• Provide technical input into system architecture reviews from a cybersecurity perspective

Required Qualifications:

• Able to work On-Site at Port San Antonio, Texas
• BS degree in Cybersecurity, Computer Science, Engineering, or related field and 8–12 years of relevant experience (or equivalent experience)
• Active Top Secret/SCI Clearance (required)
• DoD 8140 certification (e.g., CISSP, or equivalent)
• Strong hands-on experience with:
• • ACAS (Tenable.sc / Nessus)
  • SCAP and SCC tools
  • STIG implementation and validation (STIG Viewer, STIG checklists)
  • eMASS and RMF processes (ATO, IATT, continuous monitoring)
• Experience supporting:
• • NIST RMF (800-37) and 800-53 controls
  • DoD ATO processes and artifact development
  • POA&M development and management
• Strong technical experience with:
• • Linux (RHEL) and Windows systems
  • Scripting/automation (Python, Bash, PowerShell)
  • Virtualization (VMware vSphere / ESXi)
• Ability to:
• • Interpret vulnerability data and map to security controls
  • Translate technical findings into RMF artifacts
  • Work across engineering and IA teams effectively
• Strong communication skills and ability to work in a cross-functional, high-visibility environment

Additional Qualifications / Certifications (Preferred):

• Experience with:
• • Kubernetes environments and container security
  • Spectro Cloud (Palette) or similar Kubernetes management platforms
  • Automation of STIG evaluation and checklist generation
  • CI/CD pipeline security integration
  • Elastic / logging / monitoring platforms
• Familiarity with:
• • Disconnected or classified environments
  • IAVM program requirements and reporting
  • Continuous Monitoring Risk Scoring (CMRS)
• Advanced certifications:
• • ACAS Operator and Supervisor Course

About Semper Valens Solutions:

Semper Valens Solutions, Inc. (SVS) is a Service-Disabled Veteran Owned Small Business (SDVOSB) providing Cost Effective Software and Systems Engineering, Field Support, Training and Full Life cycle Support Management to the DOD and VA community. At Semper Valens, our vision is to remain a creative, cutting edge and cost-effective solutions provider where our shared intellect, industry experience, and technology excellence, make a positive difference in our customer's success. Our solutions help bridge the gap between IT and business prioritizations to optimize budgets, risks, and operational processes. We search for outstanding technical professionals, hiring at all levels of the experience spectrum; intermediate, journeyman and senior. Consider us for your career plan.

Semper Valens Solutions is an Equal Opportunity Employer

Semper Valens Solutions proactively fulfills its role as an equal opportunity employer. We do not discriminate against any employee or applicant for employment because of race, color, sex, religion, age, sexual orientation, gender identity and expression, national origin, marital/parental status, pregnancy/childbirth, or related conditions, physical or mental disability, genetic information, status as a Disabled Veteran, Recently Separated Veteran, Active-Duty Wartime or Campaign Badge Veteran, Armed Forces Services Medal, or any other characteristic protected by law. If you require a reasonable accommodation to apply for a position with Semper Valens Solutions through its online applicant system, please contact Semper Valens Solutions Human Resources Department at (830) 899-6870.Semper Valens Solutions is an affirmative action/equal opportunity employer - minorities, females, disabled, and protected veterans are urged to apply. Applicants have rights under Federal Employment Laws.

All Jobs at Semper Valens Solutions: https://sempervalens.com/careers