Systems Administrator

Leidos is a FORTUNE 500 company bringing a mix of innovative technology and sector experience to customers in the national security, engineering, and health industries.

We are seeking a Secret cleared Systems Administrator to support Postproduction Software Support (PPSS) and Post Deployment Software Support (PDSS) engineering and technical services to the CECOM Software Engineering Center Mission Command Division with operations located at Ft. Sill/Lawton, OK.

*** Relocation not provided and must be able and willing to work onsite***

The successful candidate will support our customer in performing system administration and cybersecurity work required to maintain the existing Authorization to Operate (ATO) and support network requirements for software development and the government customer.

• Manage Windows desktops, laptops, and servers by automating user provisioning, software deployment, Group Policy enforcement, and system configurations using Power Shell. Perform scheduled patching and re-imaging via SCCM.
• Perform Assured Compliance Assessment Solution (ACAS) / Nessus automated application vulnerability scanning and configuration assessments.
• Assess system compliance with DISA’s Security Technical Implementation Guides (STIGs).
• Manage and document system cybersecurity posture using Enterprise Mission Assurance Support Service (eMASS).
• Risk Management Framework (RMF) Assessment and Authorization (A&A) workflow platform.
• Assist development of System Security Plans (SSP), Information Assurance Vulnerability Alert (IAVA) compliance reporting, Plans of Action and Milestones (POA&M), and security policies and procedures.
• Provide cybersecurity support for development facilities and laboratories, supporting Agile software development, code review, and testing.

• Bachelor’s Degree in IT/Cybersecurity/Computer Science and up to 2 years of experience. Additional years of experience may be considered in lieu of a degree.
• Active and current DoD Secret clearance.
• Active CompTIA Certifications including A+ and Security+.
• Some experience performing analysis of general cyber related technical problems and finding computer system security solutions for these problems or risks.
• Some technical knowledge in one of the following areas:
  System Administration, computer applications, and security operations.
• Knowledgeable in Power Shell scripting to automate Windows desktop and laptop management tasks, including user account provisioning, Group Policy enforcement, software deployment, and system configuration; as well as Windows Server patching via SCCM/MECM.
• Knowledge of Windows and Red Hat Linux environments.
• Ability to develop cybersecurity documentation.

• Familiarity with U.S. Army Field Artillery tactical systems or other DoD systems.
• Familiarity with EMASS and the RMF Process.
• Familiarity with VMware vCenter environments.

We’re not looking for perfectly polished resumes or perfect fits. We’re looking for people who break limits, ask hard questions, and don’t wait to be told what’s next. At Leidos, we’re not following the roadmap - we’re redrawing it.

November 13, 2025

Pay Range $50,050.00 - $90,475.00

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 well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.

Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $16.7 billion for the fiscal year ended January 3, 2025. For more information, visit

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