DoD Systems Administrator & Security Engineer

TIAG; Port Hueneme (CA); On-site; USD 105,000 - 115,000; Full time

Job summary

TIAG seeks a Systems Administrator / Security Engineer to lead hands-on administration, maintenance, and security hardening across IT/OT at Port Hueneme, CA. You will own vulnerability management, RMF/ATO activities, and DISA STIG compliance to sustain Authority to Operate in DoD environments.

The role emphasizes proactive risk reduction, incident prevention, and collaboration with ISSOs and project teams to ensure mission readiness of enterprise servers, workstations, and deployable assets.

Qualifications

• Bachelor's degree in Information Technology, Computer Science, Cybersecurity, or related field.
• 5+ years in systems administration, infrastructure operations, or cybersecurity within federal/military DoD environments.
• Hands-on experience configuring Windows, Linux, and macOS platforms.

Responsibilities

• Administer, configure, monitor, and troubleshoot enterprise Windows, Linux, and macOS systems and devices.
• Maintain deployable hardware packages and expeditionary capabilities for readiness baselines.
• Execute vulnerability scans with ACAS, Nessus, and SCAP Checker and drive remediation across IT/OT.
• Harden environments per DISA STIGs, baselines, and patch requirements; support RMF/ATO artifacts.
• Develop security diagrams and provide technical leadership to cross-functional teams.

Skills

Systems administration

Security engineering

Vulnerability assessment

DISA STIGs

RMF/ATO processes

Windows/Linux/macOS

Education

Bachelor's Degree in IT/CS/Cybersecurity

Tools

ACAS

Nessus

SCAP Compliance Checker

eMASS

VRAM

STIG Viewer

Job description

TIAG seeks a Systems Administrator / Security Engineer to lead hands-on administration, maintenance, and security hardening across IT/OT at Port Hueneme, CA. You will own vulnerability management, RMF/ATO activities, and DISA STIG compliance to sustain Authority to Operate in DoD environments.

The role emphasizes proactive risk reduction, incident prevention, and collaboration with ISSOs and project teams to ensure mission readiness of enterprise servers, workstations, and deployable assets.