Linux Server Administrator

MANTECH; Quantico (VA); On-site; USD 110,000 - 150,000; Full time

Job summary

MANTECH seeks a motivated, career and customer-oriented Linux Server Administrator to join our team in Quantico, VA. The role supports mission-critical DoW IT infrastructure, installing, configuring, maintaining, and securing Linux-based servers on classified/unclassified networks to ensure high availability.

The successful candidate will implement STIGs, manage RMF compliance, provide Tier II/III support, and develop automation with Bash, Python, and Ansible, while drafting SOPs and

Qualifications

• Bachelor’s degree or higher in a technical field with 7 years IT experience; 10 years without a degree.
• Minimum 3 years progressive Linux systems administration in enterprise/DoD context.
• IAT Level II baseline certification requirements (Security+ CE, CCNA Security, or equivalent).
• Active Linux OS certification (RHCSA, CompTIA Linux+, or equivalent).
• Strong knowledge of AD, IAM, NFS, DNS, LDAP, and secure protocols (SSH).

Responsibilities

• Install, configure, and maintain Linux OSs (RHEL/Ubuntu) in physical/VMware environments.
• Apply STIGs, manage patches (IAVAs/IAVBs), and RMF compliance.
• Provide Tier II/III support for hardware, software, and network config issues.
• Develop automation scripts with Bash, Python, and Ansible to streamline tasks.
• Create and maintain SOPs, system diagrams, and CM logs.

Skills

Linux server administration

Bash

Python

Ansible

Active Directory integration

NFS/DNS/LDAP

SSH/SCP security

Education

Bachelor’s degree in Computer Science, Information Systems, or related technical discipline

Tools

VMware

Red Hat Enterprise Linux

RHCSA

CompTIA Linux+

Splunk

ACAS (Tenable Nessus)

HBSS

AWS/Azure GovCloud

Job description

MANTECH

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

• 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.