332 senior systems administrator jobs found

Refine Search
Refine Search
senior systems administrator
Back to job list
Back

Senior Systems Administrator

Stephenson Stellar Corp
Apply Now
Colorado Springs, CO, USA
$99,000 - $276,000 yearly
Jun 25, 2026
Full time

In this position you will serve as a Senior Systems Administrator for the Mission Performance & Security Systems Directorate, Enterprise Systems Project Manager, and IT Manager. We are seeking a highly experienced and hands-on candidate to support research, development, and defense systems software, hardware, and network integration laboratory. This role is critical to enabling engineers and developers to design, build, integrate, and test complex mission systems in both standalone, on-premises, and cloud-based environments. The ideal candidate brings deep technical expertise across Linux-based systems administration and infrastructure, combined with strong organizational and operational discipline required for classified environments. This position requires a proactive problem solver who thrives in dynamic lab settings and can manage multiple systems, configurations, and priorities simultaneously. Additional responsibilities include: (1) Plan, design, deploy, configure, and maintain secure lab environments supporting software, hardware, and network integration efforts; (2) Install, configure, and troubleshoot servers, workstations, and, storage systems; (3) Support integration of complex systems including embedded hardware, simulation environments, and, test platforms; (4) Create and manage system baselines, containers, virtualized environments, directory objects, configurations, and documentation in accordance with DoD RMF, ATO, and CMMC security and compliance requirements; (5) Provide hands-on support for system builds, upgrades, patching, and troubleshooting in lab and test environments; (6) Develop and maintain automation scripts and tools to streamline system provisioning and maintenance; (7) Monitor system performance, reliability, and security posture; proactively resolve issues; (8) Maintain inventory and lifecycle management of lab assets and infrastructure; and (9) Support incident response, audit readiness, and compliance inspections.

Job ID

2026-0013

Security Clearance

SECRET
About Stephenson Stellar Corp

Stephenson Stellar Corporation's mission is to create ready and relevant advances at the nexus of space and cyberspace by delivering leading edge solutions that assure the integrity and resiliency of our nation’s strategic space capabilities.

Go to job list