Description

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.

We are looking for an experienced Systems Administrator with expertise in VMware virtualization and Linux systems to join our system administrator team. You will be responsible for the daily administration, patching, troubleshooting, and lifecycle management of our VMware vSphere and Linux environments.

Primary Responsibilities

• Administer, maintain, and optimize VMware vSphere administration (ESXi, vCenter) 8.x environments

• Manage lifecycle of VMware infrastructure: upgrades, patching and cluster maintenance

• Perform day-to-day Linux systems administration on RHEL 8/9

• Build, deploy, patch, and harden Linux servers (physical and virtual) following STIG benchmarks and internal security standards

• Automate repetitive tasks using Ansible

• Perform capacity planning and performance analysis for both VMware and Linux environments

• Create and maintain detailed documentation, runbooks, and standard operating procedures

• Full lifecycle management of Red Hat Satellite Server

Basic Qualifications

• 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 Security+.

• Technical knowledge in one of the following areas: System Administration, computer applications, and security operations.

• Experienced with VMware vCenter environments.

• Expertise of Windows and Red Hat Linux environments.

• Ability to develop cybersecurity documentation.

• Ability to work at customer site in Ft Sill, OK (no telework).

Preferred Qualifications

• Familiarity with U.S. Army Field Artillery tactical systems or other DoD systems.

• Familiarity with EMASS and the RMF Process.

If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares.

Original Posting:

December 10, 2025

Pay Range:

Pay Range $50,700.00 - $91,650.00

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.

About Leidos

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 www.Leidos.com.

Pay and Benefits

Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available at www.leidos.com/careers/pay-benefits.

Securing Your Data

Beware of fake employment opportunities using Leidos’ name. Leidos will never ask you to provide payment-related information during any part of the employment application process (i.e., ask you for money), nor will Leidos ever advance money as part of the hiring process (i.e., send you a check or money order before doing any work). Further, Leidos will only communicate with you through emails that are generated by the Leidos.com automated system – never from free commercial services (e.g., Gmail, Yahoo, Hotmail) or via WhatsApp, Telegram, etc. If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at LeidosCareersFraud@leidos.com.

If you believe you are the victim of a scam, contact your local law enforcement and report the incident to the U.S. Federal Trade Commission.

Commitment to Non-Discrimination

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.