Linux System Administrator

Location: Lexington Park, MD.
Clearance: Active Secret (Interim Top Secret required to start)
Experience: 5+ Years
Employment: Full-Time

About the Opportunity

SITEC Consulting is seeking an experienced Linux System Administrator to support mission-critical software development environments for the Department of Defense (DoD).

This is a hands-on technical role where you'll work with Linux infrastructure, strengthen system security, troubleshoot complex issues, and support modern development platforms. We're looking for someone who enjoys solving problems, improving systems, and working alongside a collaborative engineering team.

What You'll Be Doing

• Linux Administration: Install, configure, maintain, and troubleshoot Linux servers, including Red Hat and CentOS environments.

• System Security: Implement DISA STIGs, perform vulnerability scans, and maintain compliance with DoD cybersecurity requirements.

• Infrastructure Support: Build new servers, manage upgrades, perform patching, and support system migrations.

• Troubleshooting: Diagnose and resolve server, application, and performance issues to maintain system availability.

• Automation: Leverage scripting and automation tools to streamline routine administration tasks.

• Development Support: Collaborate with software engineering teams in an Agile environment to support development platforms and applications.

• Documentation: Maintain accurate system configurations, procedures, and technical documentation.

• System Reliability: Support backup and recovery operations, routine maintenance, and continuous monitoring.

What We're Looking For

• 5+ years of hands-on experience administering Linux/UNIX and Windows systems.

• Strong experience with Red Hat Linux, CentOS, server builds, patching, and troubleshooting.

• Experience implementing DISA STIGs, system hardening, and vulnerability scanning.

• Understanding of DoD cybersecurity requirements and secure computing environments.

• Active CompTIA Security+ and applicable operating system certification to meet DoD 8140/5239 requirements.

• Experience supporting software development environments.

• Strong problem-solving skills and the ability to work independently or as part of a team.

• Active Secret clearance, with the ability to obtain a Top Secret clearance and an Interim Top Secret required before starting.

• U.S. citizenship required.

Bonus Points If You Have

• Experience with Docker, Kubernetes, or Docker Swarm.

• Familiarity with Ansible or other automation tools.

• Exposure to CI/CD pipelines and DevOps practices.

• Experience supporting containerized applications and modern software development infrastructure.

Why Join SITEC?

At SITEC, you'll have the opportunity to work on meaningful technical challenges while supporting critical DoD programs. We value technical expertise, teamwork, professional growth, and individuals who take pride in delivering reliable solutions.

Ready for your next challenge?

If you're a Linux professional who enjoys hands-on system administration, cybersecurity, and solving complex technical problems, we'd love to hear from you.

Apply today and take the next step in your career with SITEC Consulting!