Senior Linux Systems Administrator (Unix/Linux) – 1871

About the Role

Strategic Technology Institute is seeking a highly skilled Senior Linux Systems Administrator (SA3) to support the Naval Surface Warfare Center Dahlgren Division (NSWCDD) IT environment. In this role, you will provide advanced Unix/Linux system administration for complex, classified and unclassified IT systems that directly enable the Navy’s research, development, test, and evaluation (RDT&E) mission.

This position supports on-site IT operations across secured environments, delivering reliable system performance, troubleshooting, maintenance, and lifecycle support to meet mission requirements.

Key Responsibilities

• Administer, configure, and maintain Unix/Linux servers across secure RDT&E networks

• Perform system backup and recovery, performance tuning, and resource allocation

• Install and configure hardware, operating systems, and COTS software

• Troubleshoot system, network, and security issues across varying operating environments

• Manage system security including patching, vulnerability mitigation, and documentation

• Utilize network protocols (e.g., TCP/IP) and security tools such as firewalls and intrusion detection

• Support change, incident, and problem management processes for mission-critical systems

• Ensure compliance with DoD, DON, NAVSEA, and command-level cybersecurity requirements

Required Qualifications

• 6+ years of professional experience in Unix/Linux systems administration

• Experience with:

  • System backup/recovery and storage management

  • Hardware/software installation and configuration

  • System security, access control, and managing computing/network vulnerabilities

  • Troubleshooting hardware, software, and network components

  • Performance tuning and resource optimization in multi-system environments

• Strong understanding of TCP/IP and major network security tools

• Active T5 clearance (TS/SCI eligible)

• Must meet DoD IAT Level III certification requirements

Preferred Experience (not required)

• Experience supporting DoD or Navy RDT&E environments

• Familiarity with ITSM processes and enterprise service management frameworks

• Exposure to secure networks such as NMCI, DREN/SDREN, NREN, or JWICS

Work Environment & Schedule

• Full-time, on-site at NSWCDD in Dahlgren, VA

• Work is performed in secure classified and unclassified environments

• May require occasional after-hours or on-call support for mission needs