DoW Linux System Administrator (Mid/Senior) - 28244

HII's Mission Technologies division•Roanoke, VA

35d•$90,000 - $140,000•Onsite

About The Position

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 C5ISR 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. Our team of more than 7,000 professionals worldwide delivers all-domain expertise and advanced technologies in service of mission partners across the globe. Mission Technologies is leading the next evolution of national defense – the data evolution - by accelerating a breadth of national security solutions for government and commercial customers. Our capabilities range from C5ISR, AI and Big Data, cyber operations and synthetic training environments to fleet sustainment, environmental remediation and the largest family of unmanned underwater vehicles in every class. 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 SysAdmin, 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 DevSecOps 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.

Requirements

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
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.
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.
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.

Nice To Haves

Active TS/SCI clearance preferred
Demonstrated experience hardening systems using DISA STIGs and supporting RMF/ATO efforts
Expertise with infrastructure automation (Ansible, Terraform, PowerShell 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 DevSecOps toolchains and CI/CD pipelines (GitLab, Jenkins, Nexus, Artifactory)
Strong background in monitoring, observability, and performance tuning
Prior experience in a secure DoD, IC, or defense contractor environment
Proven ability to lead incident response and root‑cause analysis for enterprise systems

Responsibilities

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.