linux system administrator

CALNET

Job Overview We are seeking a highly skilled and motivated Linux System Administrator with active TS/SCI clearance to join our dynamic team. In this role, you will be responsible for managing and maintaining complex Linux-based IT infrastructure, ensuring system security, stability, and performance. Your expertise will support mission-critical operations, requiring a proactive approach to system architecture, security protocols, and network integration. This position offers an exciting opportunity to work on cutting-edge solutions within a fast-paced environment that values innovation and precision.Duties<ul><li>Install, configure, and maintain Linux operating systems across multiple environments, including physical servers and virtualized platforms such as VMware and ESXi.</li><li>Manage system security by implementing firewalls, VPNs, and access controls aligned with information security standards.</li><li>Monitor system performance using tools that support load balancing, RAID controller management, and system health diagnostics.</li><li>Develop and automate system administration tasks through scripting languages like Bash (Unix shell), Python, and PowerShell to streamline operations.</li><li>Design and implement scalable solutions utilizing service-oriented architecture (SOA), microservices, RESTful APIs, and cloud platforms such as AWS and Azure.</li><li>Collaborate with cross-functional teams to develop solution architecture that integrates databases like MySQL, PostgreSQL, Oracle, Microsoft SQL Server, and NoSQL databases.</li><li>Conduct regular system backups, disaster recovery planning, and patch management to ensure high availability and data integrity.</li><li>Support systems engineering efforts by designing robust system architectures that incorporate virtualization technologies such as Kubernetes containers and VMware environments.</li><li>Maintain comprehensive documentation of system configurations, procedures, and incident reports following SDLC (Software Development Life Cycle) best practices.</li></ul>Experience<ul><li>Proven experience in Linux system administration within a secure environment requiring TS/SCI clearance.</li><li>Strong understanding of operating systems including UNIX and Windows environments with hands-on experience in system design and architecture.</li><li>Demonstrated knowledge of computer networking concepts such as DNS, DHCP, TCP/IP protocols, load balancing solutions, VPNs, firewalls, and network security best practices.</li><li>Familiarity with DevOps tools like Jenkins, Git repositories, CI/CD pipelines, Docker containers, Kubernetes orchestration, and automation frameworks.</li><li>Experience working with IT infrastructure components including RAID controllers, SAN storage solutions, virtualization platforms (VMware vSphere/ESXi), and cloud services (AWS/Azure).</li><li>Skilled in scripting languages such as Bash shell scripting or Python for automation tasks; experience with PL/SQL or T-SQL is a plus.</li><li>Knowledge of solution architecture principles for enterprise systems involving RESTful APIs, microservices architecture, service-oriented architecture (SOA), and API management.</li><li>Background in systems engineering with a focus on system design for high availability environments supporting critical operations. Join us to leverage your expertise in Linux systems administration while contributing to vital national security missions! We value innovation-driven professionals who thrive in collaborative settings dedicated to excellence in IT infrastructure management.</li></ul>Pay: $90,000.00 - $120,000.00 per yearBenefits:<ul><li>401(k)</li><li>401(k) matching</li><li>Dental insurance</li><li>Health insurance</li><li>Life insurance</li><li>Paid time off</li><li>Vision insurance</li></ul>Work Location: In person

LINUX System Administrator with TS/SCI Clearance

Shield Consulting Solutions

<div>**Active TS/SCI w/Polygraph REQUIRED** Please do not apply if you do not currently possess this level of clearance.
- 
 
Telework: None 
 
Basic Requirements:
<ul><li>Security+ Cert</li>
<li>15 years of experience as a System Administrator</li>
<li>Bachelor&rsquo;s degree in a technical discipline
<ul><li>5 additional years of experience as a System Administrator may be substituted for a degree</li>
</ul></li></ul> 
Job Description:
<ul><li>Provide administration and support for Windows Server 2019 and 2022 environments, including Active Directory, DNS, Certificate Authorities and manage Windows 10/11 client systems.</li>
<li>Administer and troubleshoot various Linux distributions (e.g., RHEL8/9, AmazonLinux 2023) within AWS.</li>
<li>Deploy, and maintain robust cloud environments, primarily within AWS, while also supporting existing on-premises server infrastructure.</li>
<li>Develop, implement and maintain automation scripts and configurations using SaltStack, Ansible, Bash and Python to streamline infrastructure provisioning, configuration management and deployment processes</li>
</ul>
 
Required Experience:
<ul><li>AWS cloud resources, including EC2, S3, VPC, IAM, and other core services.</li>
<li>SaltStack, Ansible, Bash and Python
</li><li>Windows Server 2019 and 2022 environments,</li>
<li>Linux distributions (e.g., RHEL8/9, Amazon Linux 2023) within AWS.</li>
</ul>
 
Salary: $165,000 - $175,000 annually 
- 
Excellent benefits package including 25 days PTO, 11 paid holidays, 100% employer-paid healthcare for employees and dependents &ndash; available day 1, 8% 401(k) employer match &ndash; immediate vesting.
 
 
Disclaimer: The salary range provided is an estimate based on current market conditions and may be adjusted based on factors such as experience, skills, and qualifications. The final salary offer will be determined after a thorough review of the candidate's background and alignment with the role. Please note that this range is subject to change and should be considered as a guideline rather than a definitive figure. 
 
Shield Consulting Solutions is an equal opportunity/affirmative action employer. All qualified applicants will receive consideration for employment without regard to sex, gender identity, sexual orientation, race, color, religion, national origin, disability, protected Veteran status, age, or any other characteristic protected by law.</div>

Cloud Systems Engineer (Windows/Linux)

White Label Communications

Linux + VoIP Systems AdministratorFor recruiters, BPOs, and staffing agencies<ul><li>WLC is not accepting third-party submissions for this role at this time.</li></ul>Full-time | Long-term | Contract | Fully remote<ul><li>WLC is seeking 2 strong Linux + VoIP Systems Administrators to join our Infrastructure Engineering, Operations, and Planning team. This role reports to the Manager of Infrastructure.</li><li>We are looking for experienced, independent operators who can make sound technical decisions, work safely in production, troubleshoot complex issues end to end, and improve the stability, security, and maintainability of our Linux-based voice infrastructure.</li></ul>Schedule<ul><li>Monday through Friday during normal business hours aligned to U.S. Eastern Time, including seasonal shifts between EST (UTC-5) and EDT (UTC-4)</li><li>Occasional after-hours maintenance work as needed and scheduled in advance</li></ul>What you will do<ul><li>Build, operate, maintain, and improve Linux-based infrastructure supporting customer-facing services</li><li>Administer and troubleshoot VoIP platforms and SIP signaling in production environments</li><li>Support high-availability systems across production, lab, development, and pre-production environments</li><li>Diagnose and resolve issues involving SIP, RTP, call routing, registrations, media flow, and related service dependencies</li><li>Write and maintain shell scripts and tooling for automation, operational safety, and visibility</li><li>Follow disciplined change management and production safety practices</li><li>Help maintain secure, compliant infrastructure aligned with company standards and audit requirements</li><li>Work effectively and independently in a remote environment while coordinating with the broader infrastructure team</li></ul>Required qualifications<ul><li>3+ years of hands-on Linux systems administration experience in a 24x7 production environment</li><li>3+ years of hands-on experience with VoIP SIP and RTP technologies, signaling and call flow troubleshooting, and one or more of FreeSWITCH, Asterisk, Kamailio, OpenSIPS, SER/OpenSER</li><li>Strong operational judgment and a demonstrated ability to make safe changes in production</li><li>Experience with Linux system services, patching, backups, logging, monitoring, access control, and security hardening</li><li>Strong shell scripting skills for automation and operational support</li><li>Experience working independently with minimal supervision</li><li>Strong written English and clear technical communication</li><li>Quiet, private, and secure remote workspace</li><li>At least 2 reliable high-quality Internet connections</li><li>Willingness to work on WLC-provided equipment</li></ul>Strongly preferred<ul><li>Experience with centralized logging, monitoring, AAA, jump hosts, and change management processes</li><li>Experience with KVM, VMware, Hyper-V, or other virtualization platforms</li><li>Experience operating Linux workloads in cloud environments such as AWS, Azure, or Google Cloud</li><li>Experience working in regulated or audited environments such as ISO 27001, SOC 2, HIPAA, GDPR, and PCI</li></ul>What success looks like in this role<ul><li>You can troubleshoot Linux and VoIP issues methodically without creating unnecessary production risk</li><li>You escalate when appropriate, but you do not require constant direction</li><li>You document your work, communicate clearly, and make careful changes</li><li>You look for durable fixes, not just quick ones</li></ul>Job Types: Full-time, Contract Contract length: 1-180 monthsPay: Rs10,000.00 - Rs100,000.00 per weekApplication Question(s):<ul><li>If the role was offered to you, how quickly could you start working (in calendar days)?</li><li>Do you have a quiet, private, and secured location to work remotely out of, with at least 2 reliable and good quality Internet connections?</li><li>You agree and accept that the position is Mon-Fri normal daytime business hours following the seasonal EST(UTC-5) and EDT(UTC-4) time zones?</li><li>Do you agree to having a background check performed on you? This role requires individuals with non-negative background check results.</li><li>Do your resume and LinkedIn profile make it clear that you meet or exceed the requirements outlined in the job description?</li><li>What is your expected weekly income, in US dollars, for a 40-hour work week? This is what you regularly invoice us for, excluding maintenance, on call, or after-hour extra work time.</li><li>You are comfortable working in, adhering to, building, and maintaining, a strict ISO 27001, HIPAA, PCI, GDPR, and SOC2 compliance environment?</li><li>You are applying to this position for yourself? This means you, and only you, will be performing the work.</li><li>Do you have 3+ years of hands-on experience as a lead Linux SysAdmin in a 24x7 high availability environment, without downtime, data loss, or blind spots?</li><li>Do you have 3 or more years of engineering experience with FreeSWITCH, Asterisk, Kamailio (OpenSER), OpenSIPS, and/or SER?</li></ul>Work Location: Remote

Linux VoIP SysAdmin

<div>JT4, LLC provides engineering and technical support to multiple western test ranges for the U.S. Air Force, Space Force, and Navy under the Joint Range Technical Services Contract, better known as J-Tech II. JT4 develops and maintains realistic, integrated test and training environments and prepares our nation's war-fighting aircraft, weapons systems, and aircrews for today's missions and tomorrow's global challenges.

The System Administrator IV will work with post flight data management and provide support to a variety of customers to include flight test engineers and data analysts.

JOB DUTIES - ESSENTIAL FUNCTIONS

Evaluates system specifications, configures system, establishes standards, ensures hardware/software compatibility and maintains workstations and Microsoft (MS) Windows Operating Systems for stable performance.

Employee will be responsible for the following functions/duties:
<ul>
<li>Performs the daily operation of MS Win server software to include system security, appropriate access, configuration and backing up the system</li>
<li>Specifies network requirements, monitors locate area network (LAN) performance, troubleshoots networking hardware and ensures system is working properly according to specifications and parameters</li>
<li>Organizes and secures directory structure and assists / trains staff members in the use of department.</li>
<li>Data Management (DM) System, associated databases and Configuration Management (CM)/DM release procedures</li>
<li>Maintains and designs functional, visually esthetic web pages</li>
<li>Specifies hardware requirements and provides a Computer Authorization and Custodial Receipt Listing (CA/CRL) to track equipment configurations and identification logs</li>
<li>Serves as point of contact (POC) for problem reporting, incremental version updates and monitors yearly support contract</li>
<li>Makes recommendations for future hardware/software implementations and related process improvements, schedules, plans and performs system upgrades including the transition from design, test, production and documentation environments</li>
<li>Provides operational status as required</li>
<li>Uses established policies and procedures and subject matter knowledge to complete complex assignments requiring originality and ingenuity performed under minimum supervision with considerable latitude for independent contribution</li>
</ul>
<div>RANGE POSITION DESCRIPTION
</div>
The System Administrator IV will work with post flight data management and provide support to a variety of customers to include flight test engineers and data analysts. They will perform corrective and preventive maintenance procedures on all necessary equipment. Ideal candidate will be proficient with Windows OS and Windows Server 2016/2019/2022, LINUX Administration, Windows Domain Administration, Nutanix AHV and PRISM, Citrix VM Deployment, Network Switch Administration, Citrix License Administration, NVIDIA vGPU License Administration, Hardware Troubleshooting, Software Troubleshooting, DoD SCAP Benchmarks Scans, and Net Backup Administration. System Administrator IV must also be able to assist in the creation of Operating Instructions (OIs) as required. A successful candidate must be a team player, eager to learn, and just as eager to share his/her knowledge in order to strengthen the team. This position requires a current CompTIA Security+ CE certificate as well as the ability to maintain a DoD Secret level clearance.

REQUIREMENTS - EDUCATION, TECHNICAL, AND WORK EXPERIENCE

Associates or higher degree in Computer/Information Technology, or equivalent academic/technical training. Possess nine (9) years related experience or combination of experience in computer system basics and/or related areas of expertise. Must possess and apply a broad knowledge of principles, practices and procedures in computer science, graphics, and information systems.

In addition, a Systems Administrator IV must possess the following qualifications:
<ul>
<li>Must have specific experience in the use of MS window server environments and various computer-aided design/computer-aided manufacturing (CAD/CAM), database, MS Office and Web enabled applications</li>
<li>Must possess planning/organizing skills and must be able to work under deadlines</li>
<li>Employee is expected to routinely cross fields in the completion of somewhat difficult and varied assignments
</li><li>Must be capable of updating or repairing computer systems
</li><li>The candidate must possess a valid, state issued driver's license. Must be able to obtain and maintain security clearance. Must be a U.S. citizen.</li>
</ul>
<div>SALARY
</div>
The expected salary range for this position is $110,000 to $160,000 annually.

Note: The salary range offered for this position is a good faith description of the expected salary range this role will pay. JT4, LLC considers factors such as (but not limited to) responsibilities of the position, candidate's work experience, education/training, key skills, internal peer equity, as well as, market and business considerations when extending an offer.

BENEFITS
<ul>
<li>Medical, Dental, Vision Insurance
</li><li><ul><li>Benefits Active on Day 1</li>
</ul></li><li>Life Insurance</li>
<li>Health Savings Accounts/FSA's</li>
<li>Disability Insurance</li>
<li>Paid Time Off</li>
<li>401(k) Plan Options with Employer Match
</li><li><ul><li>JT4 will match 50%, up to an 8% contribution</li>
<li>100% Immediate Vesting
</li></ul></li><li>Tuition Reimbursement</li>
</ul>
<div>OTHER RESPONSIBILITIES
</div>
Each employee must read, understand, and implement the general and specific operational, safety, quality, and environmental requirements of all plans, procedures, and policies pertaining to their job.

WORKING CONDITIONS

This position involves work typical of an office environment with no unusual hazards. There is occasional lifting (up to 20 pounds), constant sitting and use of a computer terminal, constant use of sight abilities while writing, reviewing, and editing documents, constant use of speech/hearing abilities for communication, and constant mental alertness.

DISCLAIMER

The above statements are intended to describe the general nature and level of work being performed by people assigned to this classification. They are not intended to be construed as an exhaustive list of all responsibilities, duties and skills required of persons so classified.

Tasking is in support of a Federal Government Contract that requires U.S. citizenship. Some jobs may require a candidate to be eligible for a government security clearance, state-issued driver's license, or other licenses/certifications, and the inability to obtain and maintain the required clearance, license, or certification may affect an employee's ability to maintain employment.

SCC: CSAN6, JIT13, A1412TW</div>

System Administrator IV

DeepSource Technologies

<div>Job Overview
We are seeking an experienced Senior OpenShift / Linux Engineer to manage, deploy, and optimize containerized environments using Red Hat OpenShift Container Platform. The ideal candidate will have strong Linux administration skills and hands-on experience in building scalable, secure, and highly available container platforms.
Key Responsibilities<ul><li>
Deploy, configure, and manage Red Hat OpenShift Container Platform (OCP)
</li><li>Administer and maintain Linux-based systems (RHEL/CentOS)
</li><li>Design and support containerized applications and microservices architectures
</li><li>Manage Kubernetes clusters (via OpenShift) including scaling, upgrades, and monitoring
</li><li>Implement CI/CD pipelines and support DevOps practices
</li><li>Troubleshoot platform, container, and infrastructure issues
</li><li>Ensure system security, patching, and compliance standards
</li><li>Collaborate with development and infrastructure teams for application deployment
</li><li>Monitor system performance and optimize resource utilization</li></ul> 

Requirements 

Requirements
Minimum 5+ years of experience in Linux system administration and container platforms
<ul><li>Hands-on experience with:
</li><li>Red Hat OpenShift Container Platform
</li><li>Kubernetes and Docker/containers
</li><li>Linux (RHEL/CentOS)
</li></ul>Strong understanding of:
<ul><li>Container orchestration
</li><li>Networking concepts (DNS, load balancing, ingress)
</li><li>Storage in container environments
</li><li>Experience with scripting (Bash, Python, etc.)
</li><li>Familiarity with CI/CD tools (Jenkins, GitLab CI, etc.)</li></ul></div>

Senior OpenShift / Linux Engineer - Manama, Bahrain

WorkForce

We&rsquo;re Hiring: System Administrator (DevOps) Doha, QatarJob Summary We are seeking a proactive System Administrator with DevOps experience to manage IT infrastructure, cloud environments, automation, and system security.Key Responsibilities<ul><li>Manage Linux and Windows servers, storage, and backup systems</li><li>Administer firewalls and network security (FortiGate, Cisco)</li><li>Work with AWS/Azure cloud and virtualization (VMs, Docker, Kubernetes)</li><li>Build and maintain CI/CD pipelines (Jenkins, GitLab CI, GitHub Actions)</li><li>Automate infrastructure using Terraform and Ansible</li><li>Monitor systems using Prometheus, Grafana, and ELK stack</li><li>Handle networking (DNS, VPN, VLANs) and troubleshooting</li><li>Ensure security compliance and optimize system performance</li></ul>Requirements<ul><li>Bachelor&rsquo;s degree in IT, Engineering, or related field</li><li>3+ years of experience in System Administration / DevOps</li><li>Strong experience with AWS/Azure, Linux, and Windows environments</li><li>Solid understanding of networking and scripting (Bash, Python, PowerShell)</li><li>Database knowledge (MySQL, PostgreSQL, MongoDB)</li></ul>Preferred <ul><li>AWS / Azure / Linux / DevOps certifications</li><li>Experience with monitoring and logging tools</li><li>Knowledge of security standards (ISO 27001, CIS)</li></ul>Contact: 30530016 Apply: bdm@workforceqatar.comJob Type: PermanentWork Location: In person

SYSTEM ADMINISTRATOR

Public Cloud Services - PCS

<div>
 Job Title: Senior System Administrator
 
 
 Department: IT
 
 Location: El Sheikh Zayed, Giza
 
 Reporting To: Infrastructure Head
 
 Direct Reports: N/A
 
 
 
 
 
 
 
 Job Purpose
 
 
 The Senior System Administrator is responsible for designing, implementing, and maintaining the organization&rsquo;s IT infrastructure. This role ensures high availability, performance, security, and reliability of systems across on-premises and cloud environments, with a strong focus on virtualization, Windows &amp; Linux servers, Microsoft Azure, and Office 365.
 
 
 
 
 
 
 
 
 Key Duties &amp; Responsibilities
 
 
 Infrastructure &amp; Systems Management
 
 
 
 <ul>
 <li>
 
 Design, deploy, and manage virtualized environments using VMware, Hyper-V, or KVM.
 
 
 </li>
 <li>
 
 Install, configure, administer, and troubleshoot Windows and Linux servers.
 
 
 </li>
 <li>
 
 Monitor system performance and optimize configurations to ensure efficiency and stability.
 
 
 </li>
 <li>
 
 Ensure systems are updated with the latest patches, upgrades, and security updates.
 
 
 
 </li>
 </ul>
 Active Directory &amp; Identity Management
 
 
 
 <ul>
 <li>
 
 Manage Active Directory services, including user accounts, group policies, and permissions.
 
 
 </li>
 <li>
 
 Maintain secure access controls and directory services best practices.
 
 
 
 </li>
 </ul>
 Cloud &amp; Microsoft Services
 
 
 
 <ul>
 <li>
 
 Manage and administer Microsoft Azure services, including provisioning and configuration of cloud resources.
 
 
 </li>
 <li>
 
 Administer and support Microsoft Office 365 services to ensure optimal performance and user accessibility.
 
 
 
 </li>
 </ul>
 Security, Backup &amp; Recovery
 
 
 
 <ul>
 <li>
 
 Implement and maintain security controls, antivirus solutions, and access management policies.
 
 
 </li>
 <li>
 
 Develop, manage, and test backup and disaster recovery strategies to ensure data availability and integrity.
 
 
 
 </li>
 </ul>
 Database Administration
 
 
 
 <ul>
 <li>
 
 Manage and support MS SQL databases, including configuration, performance tuning, and backup strategies.
 
 
 
 </li>
 </ul>
 Documentation &amp; Collaboration
 
 
 
 <ul>
 <li>
 
 Create and maintain technical documentation for systems, configurations, and procedures.
 
 
 </li>
 <li>
 
 Collaborate with other IT teams to support applications and infrastructure services.
 
 
 </li>
 <li>
 
 Provide technical guidance and support to junior team members.
 
 
 
 </li>
 </ul>
 Troubleshooting &amp; Support
 
 
 
 <ul>
 <li>
 
 Diagnose and resolve hardware, software, and system issues on time.
 
 
 </li>
 <li>
 
 Provide advanced technical support to ensure minimal downtime.
 
 
 
 
 
 </li>
 </ul>
 Requirements
 
 
 Experience &amp; Qualifications
 
 <ul>
 <li>
 
 Education: Bachelor&rsquo;s degree in Computer Science, Information Technology, or a related field.
 
 
 </li>
 <li>
 
 Experience: Minimum of 5 years of hands-on experience in system administration, with strong exposure to virtualization, Windows, Linux, Azure, and Office 365.
 
 
 </li>
 <li>
 
 Certifications (Preferred):
 
 
 </li>
 <ul>
 <li>
 
 MCSE
 
 
 </li>
 <li>
 
 RHCE
 
 
 </li>
 <li>
 
 Azure Administrator Associate
 
 
 </li>
 <li>
 
 VMware Certified Professional (VCP)
 
 
 </li>
 </ul>
 </ul>
</div>

Senior System Admin

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