Linux Systems Administrator

General information

Requisition #: R69413

Locations: USA-IN-Crane

Posting Date: 07/22/2026

Security

Clearance Required:

Interim Secret

Remote Type:
Hybrid

Time Type:
Full time

Shape the future of defense with MANTECH! Join a team dedicated to safeguarding our nation through advanced tech and innovative solutions. Since 1968, we’ve been a trusted partner to the Department of Defense, delivering cutting-edge projects that make a real impact. Dive into exciting opportunities in Cybersecurity, IT, Data Analytics and more. Propel your career forward and be part of something extraordinary.

Your journey starts now—protect and innovate with MANTECH!

MANTECH seeks a motivated, career and customer-oriented Senior Linux System Administrator to join our team working in Crane, IN. This is a hybrid position requiring 3 days onsite per week.

Responsibilities include but are not limited to:

• Provide support for the virtualization of Linux based virtual machines.

• Patch and STIG Linux Operating to ensure compliance with DoD Information Assurance standards.

• Provide troubleshooting support for Linux/Windows Operating Systems.

• Perform system updates and server configurations, including upgrades of the Operating System.

• Implement changes to locally hosted workstations/servers. Support virtual and physical networking configurations.

• Provide hardware, software, and network troubleshooting.

• Provide support for the administration of multiple VMWare ESXi environments across the RDT&E enterprise.

• Provide support the virtualization of Linux based virtual machines.

Minimum Qualifications:

• High School diploma or equivalent education

• 7+ years of experience in IT

• 2+ years of experience as a Systems Administrator working with Linux

• Must possess a CASP+, CISSP, or equivalent DoD 8570.01 / 8140 IAT Level III certification, or successfully obtain it within 30 days of offer acceptance and prior to beginning employment. Start date is contingent upon verification

• Experience with virtual and physical networking configuration

• Experience troubleshooting hardware, software, and networks

• Experience working with DISA STIG guidance and RMF requirements

Preferred Qualifications:

• Red Hat 7, or higher, Enterprise administration, including workstation and server

• Red Hat 8/Ubuntu
  22, or higher, Enterprise administration, including workstation and server

• Familiar with High Performance Computing (HPC) and Load Balancing for various applications

Clearance Requirements:

• Must have the ability to obtain and maintain an active US Government Secret Security Clearance

• Uncleared candidates will be required to obtain an interim secret security clearance to start

Physical Requirements:

• The person in this position must be able to remain in a stationary position 80% of the time.

• Occasionally move about inside the office to access file cabinets, office machinery, or to communicate with co-workers, management, and customers, via email, phone, and or virtual communication, which may involve delivering presentations. Must be able to exchange accurate information in these situations.

MANTECH considers all qualified applicants for employment without regard to disability or veteran status or any other status protected under any federal, state, or local law or regulation.

If you need a reasonable accommodation to apply for a position with MANTECH, please email us at  and provide your name and contact information.