DoW Linux System Administrator; Mid​/Senior

Requisition Number: 28244

Required Travel: 0 - 10%

Employment Type:

Full Time/Salaried/Exempt

Anticipated Salary Range: $90,000.00 - $

Security Clearance:
Ability to Obtain

Level of

Experience:

Entry Level

This opportunity resides with Warfare Systems (WS), a business group within HII’s Mission Technologies division. Warfare Systems comprises cyber and mission IT; electronic warfare; and C5

ISR systems.

HII works within our nation’s intelligence and cyber operations communities to defend our interests in cyberspace and anticipate emerging threats. Our capabilities in cybersecurity, network architecture, reverse engineering, software and hardware development uniquely enable us to support sensitive missions for the U.S. military and federal agency partners.

Step into a senior technical role where your architecture, hardening, and automation skills—particularly in Linux environments—directly enable engineers building critical Department of War technologies. As a Sys Admin, you are the technical authority for program‑owned infrastructure: designing secure identity and network patterns, leading incident response, establishing STIG‑aligned baselines for Linux and hybrid platforms, and driving automation so our systems are reliable, auditable, and fast.

You’ll collaborate with Dev Sec Ops  on cloud and CI/CD platform integration, and help prove readiness through RMF/ATO evidence, vulnerability closure, and measurable SLAs.

If you thrive on solving complex problems, designing resilient systems, and leading high‑stakes technical work with visible mission impact, this is your seat at the table.

• Maintains smooth operation of multi-user computer systems, including coordination with network administrators.
• Interacts with users and evaluates vendor products.
• Makes recommendations to purchase hardware and software, coordinates installation and provides backup recovery.
• Develops and monitors policies and standards for allocation related to the use of computing resources.
• Ancillary duties may include setting up administrator and service accounts, maintaining system documentation, tuning system performance, installing system wide software and allocating mass storage space.
• Position will be on-site in Roanoke, VA
  .

• Demonstrated experience administering and securing primarily Linux enterprise environments.
• Strong knowledge of networking fundamentals, including DNS, DHCP, VLANs, routing, and firewall concepts.
• Experience performing system hardening, patch management, and vulnerability remediation.
• Proven ability to manage multi‑user system environments and collaborate with network, security, and engineering teams.
• Experience developing or maintaining system documentation, configurations, and operational procedures.
• Ability to obtain and maintain a DoD security clearance and meet program‑specific eligibility requirements.

Systems Administrator II 3 years relevant experience with Bachelors in related field; 1 year relevant experience with Masters in related field; or High School Diploma or equivalent and 7 years relevant experience.

Systems Administrator III 6 years relevant experience with Bachelors in related field; 4 years relevant experience with Masters in related field; or High School Diploma or equivalent and 10 years relevant experience.

Systems Administrator IV 10 years relevant experience with Bachelors in related field; 8 years relevant experience with Masters in related field; or High School Diploma or equivalent and 14 years relevant experience.

• Active TS/SCI clearance preferred.
• Demonstrated experience hardening systems using DISA STIGs and supporting RMF/ATO efforts.
• Expertise with infrastructure automation (Ansible, Terraform, Power Shell DSC, or similar).
• Experience designing and managing identity services (AD, LDAP, PKI) and Zero Trust–aligned architectures.
• Hands‑on experience with virtualization platforms (VMware, Nutanix, or similar).
• Familiarity with Dev Sec Ops  tool chains and CI/CD pipelines (Git Lab, Jenkins, Nexus, Artifactory).
• Strong background in monitoring, observability, and performance tuning.
• Prior experience in a secure DoD, IC, or defense…