Linux Server Administrator

Linux Server Administrator

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MANTECH seeks a motivated, career and customer-oriented LINUX SERVER ADMINISTRATOR to join our team in QUANTICO, VA.

This position supports mission-critical Department of War (DoW) IT infrastructure. The contractor will be responsible for the installation, configuration, maintenance, and security of Linux-based server environments on classified and unclassified networks to ensure the high availability and resilience of vital national security assets.

Responsibilities include but are not limited to:

• Install, configure, and maintain Linux operating systems (including Red Hat Enterprise Linux and Ubuntu) across both physical and virtual (VMware) environments to optimize resource utilization and infrastructure stability.
• Drive mission success by implementing DoD Security Technical Implementation Guides (STIGs), executing critical vulnerability patching (IAVAs/IAVBs), and maintaining strict compliance with Risk Management Framework (RMF) standards.
• Ensure high availability of mission applications and storage solutions by monitoring server health and serve as Tier II/III technical support to rapidly diagnose and resolve complex hardware, software, and network configuration issues.
• Develop and manage automation scripts (using Bash, Python, and Ansible) to streamline routine administrative tasks, deployments, audit reporting, driving operational velocity and accuracy.
• Draft and maintain thorough Standard Operating Procedures (SOPs), detailed system architecture diagrams, and configuration management logs to uphold organizational transparency and compliance.

Minimum Qualifications:

• Bachelor's degree in Computer Science, Information Systems, or a related technical discipline and a total of 7 years IT experience. A total of 10 years' experience without a degree.
• Minimum of 3 years of progressive experience in enterprise-level Linux systems administration, preferably within a federal or DoD environment.
• Meet IAT Level II baseline certification requirements (process active CompTIA Security+ CE, CCNA Security, or equivalent certification).
• Must hold an active Linux OS certification (e.g., Red Hat Certified System Administrator (RHCSA), CompTIA Linux+, or equivalent).
• Strong working knowledge of Active Directory integration, Identity Management, NFS, DNS, LDAP, and secure communication protocols (SSH, SCP).

Preferred Qualifications:

• Direct operational experience utilizing Splunk, ACAS (Tenable Nessus), and Host Based Security System (HBSS).
• Familiarity with modern infrastructure technologies, including Kubernetes, Docker, or AWS/Azure GovCloud environments.

Clearance Requirements:

Must have a current/active Top Secret / Sensitive Compartmented Information (TS/SCI) security clearance.

Physical Requirements:

The person in this position must be able to remain in a stationary position 50% of the time. Occasionally move about inside the office to access file cabinets, office machinery, or to communicate with co-workers, management, and customers, via email, phone, and or virtual communication, which may involve delivering presentations.

The projected compensation range for this position is $128,000.00-$214,400.00. There are differentiating factors that can impact a final salary/hourly rate, including, but not limited to, Contract Wage Determination, relevant work experience, skills and competencies that align to the specified role, geographic location (For Remote Opportunities), education and certifications as well as Federal Government Contract Labor categories. In addition, MANTECH invests in its employees beyond just compensation. MANTECH's benefits offerings include, dependent upon position, Health Insurance, Life Insurance, Paid Time Off, Holiday Pay, short-term and long-term Disability, Retirement and Savings, Learning and Development opportunities, wellness programs as well as other optional benefit elections. MANTECH considers all qualified applicants for employment without regard to disability or veteran status or any other status protected under any federal, state, or local law or regulation. If you need a reasonable accommodation to apply for a position with MANTECH, please email us at and provide your name and contact information.