> Markdown version of [/jobs/ext/3868821-systems-administrator](https://www.wearedevelopers.com/jobs/ext/3868821-systems-administrator). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md).

---

# Systems Administrator

- **Company:** TIAG LLC
- **Location:** Port Hueneme, CA, United States
- **Experience:** Expert
- **Salary:** $105,000.0 - $115,000.0
- **Contract:** Permanent contract
- **Skills:** Microsoft Windows, Apple Mac Systems, CompTIA Security+, Cyber Security, System Configuration, Linux, Information Security Management, Networking Hardware, Virtualization Technology, Software Vulnerability Management, Windows Desktop, Computer Networking Systems, Peripherals, Information Technology, Process Control Systems, Patch Management, Nessus, Operational Systems, CIS Benchmarks, Scap Compliance Checker, Network Server, Vulnerability Analysis
- **Published:** October 22, 2026
- **Apply:** https://www.indeed.com/viewjob?jk=24fa297e28265f90

## About the Role

* Active Secret Security Clearance (with Top Secret eligibility).
 * 5+ years of progressive experience in systems administration, infrastructure operations, or cybersecurity engineering within a federal, military, Navy, or DoD/DoW environment.
 * 5+ years of hands-on experience configuring, maintaining, and troubleshooting Windows, Linux, and macOS platforms.
 * Demonstrated experience independently running, analyzing, and remediating vulnerability scans using ACAS, Nessus, or comparable tools. -Proven track record applying DISA STIGs, security baselines, system hardening, and patch management across enterprise networks and hardware.
 * Direct experience supporting technical RMF and ATO artifact generation, control implementation, and remediation tracking.
 * Strong proficiency troubleshooting hardware, OS, network, access, and configuration issues through final resolution.
 * Bachelor's Degree in Information Technology, Computer Science, Cybersecurity, or a related technical discipline (or equivalent professional experience).

Preferred Qualifications

 * DoD 8140/8570 IAT Level II Certification (e.g., CompTIA Security+, CySA+, SecurityX, or CISSP).
 * Hands-on experience supporting Operational Technology (OT), Industrial Control Systems (ICS), or industrial networks.
 * Direct experience configuring, maintaining, and validating deployable IT packages or expeditionary fly-away kits.
 * Advanced familiarity with DoD compliance management tools, including eMASS, VRAM, STIG Viewer, and SCAP Compliance Checker.
 * Knowledge of NIST SP 800-53 and CNSSI 1253 security controls and architecture traceability.

## Description

In this role, the Systems Admin/Engineer will take end-to-end ownership of maintaining operational continuity, visibility, and resilience for enterprise servers, workstations, virtualization platforms, OT/ICS hardware, and specialized deployable assets such as fly-away kits.

This position requires a full-time, onsite schedule (M-F) during standard business hours in support of mission-focused Navy and Department of Defense (DoD) environments. The ideal candidate brings an authoritative, proactive mindset to systems administration, vulnerability management, and defense compliance. The Systems Administrator/Engineer will need to possess deep expertise executing ACAS and Nessus vulnerability scans, implementing DISA STIGs, and supporting Risk Management Framework (RMF) execution to achieve and maintain Authority to Operate (ATO) status.

As a collaborative thought partner to project leads, Information System Security Officers (ISSOs), and client leadership, they will resolve complex technical issues, mentor junior team members, and ensure system readiness across diverse IT/OT infrastructure., * Administer, configure, monitor, and troubleshoot enterprise Windows, Linux, and macOS systems, servers, workstations, network devices, security appliances, and virtualized platforms.

 * Maintain deployable hardware packages and expeditionary capabilities, including fly-away kits, peripherals, operating systems, security controls, and readiness baselines.
 * Execute and analyze independent vulnerability scans using ACAS, Nessus, and SCAP Compliance Checker, prioritizing and validating technical remediation across IT/OT systems.
 * Harden operating environments, OT/ICS components, and specialized endpoints in alignment with DISA STIGs, security baselines, and patching requirements. - Support RMF and ATO processes by implementing security controls, generating control narratives, producing technical evidence, and managing data within eMASS and VRAM.
 * Perform routine system hygiene, account management, endpoint maintenance, asset tracking, and log reviews to ensure continuous compliance and operational readiness.
 * Develop security architecture diagrams and control-to-component traceability, while providing technical leadership and mentoring to cross-functional team members.