Systems Administrator - TS​/SCI Poly Security Clearance

Position: Systems Administrator - TS/SCI with Poly with Security Clearance
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- Description Leidos is seeking an experienced Systems Administrator to join our team in supporting mission-critical IT infrastructure. This role is ideal for a professional with solid systems administration expertise, particularly in pipeline automation and/or VMware environments across Windows and/or Linux platforms. You will work in a collaborative, high-security environment, ensuring the reliability, security, and efficiency of systems that support national security objectives.

This position involves hands-on administration, automation of deployment pipelines, virtualization management, and troubleshooting in a dynamic setting. The ideal candidate will bring mid-level experience to optimize system performance, implement automation solutions, and maintain compliance with stringent security protocols.

Primary Responsibilities:

* Administer and maintain Windows and/or Linux servers, including installation, configuration, patching, and performance tuning.

* Design, implement, and manage pipeline automation for CI/CD processes using tools like Jenkins, Ansible, or similar to streamline deployments and operations.

* Manage VMware environments (e.g., vSphere, ESXi), including virtual machine provisioning, resource allocation, clustering, and disaster recovery.

* Monitor system health, troubleshoot issues, and perform root cause analysis for hardware, software, and network-related problems.

* Ensure compliance with security standards, including vulnerability scanning, remediation, and audit support in a classified environment.

* Collaborate with cross-functional teams (e.g., developers, security engineers) to integrate systems and automate workflows.

* Participate in on-call rotations, system upgrades, and capacity planning to support 24/7 operations.

* Document procedures, configurations, and best practices for knowledge sharing and continuity.

* Stay current with emerging technologies in systems administration, automation, and virtualization.

Basic Qualifications:

* Bachelor's degree with 4+ years of experience or a Masters degree with 2+ years of experience. Additional experience may be considered in lieu of a degree.

* US Citizen with an active TS/SCI with Poly security clearance.

* Proven experience in systems administration for Windows and/or Linux environments.

* Hands-on experience with pipeline automation tools (e.g., Jenkins, Git Lab CI, Ansible) and/or VMware technologies (e.g., vSphere, vCenter).

* Familiarity with scripting languages such as Power Shell, Bash, or Python for automation tasks.

* Understanding of networking concepts, storage solutions, and cloud integration (e.g., AWS, Azure).

* Strong problem-solving skills, with the ability to handle complex issues in high-stakes environments.

* Excellent communication skills for team collaboration and documentation.

* CompTIA Security+ certification

Preferred Qualifications:

* Certifications such as RHCE, MCSE, VCP (VMware Certified Professional).

* Experience in Dev Ops practices, containerization (e.g., Docker, Kubernetes), or infrastructure as code (e.g., Terraform).

* Knowledge of federal security standards (e.g., NIST, FISMA) and experience in classified environments.

* Exposure to hybrid/multi-cloud setups or advanced virtualization features like NSX.
Come break things (in a good way). Then build them smarter. We're the tech company everyone calls when things get weird. We don’t wear capes (they’re a safety hazard), but we do solve high-stakes problems with code, caffeine, and a healthy disregard for “how it’s always been done.” Original Posting:
December 30, 2025 For U.S. Positions:
While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above. Pay Range:
Pay Range $87,100.00 - $ The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as…