Systems Administrator

General information

Requisition #

R71894

Locations

USA-TX-San Antonio

Posting Date

11/06/2026

Security Clearance Required

TS/SCI w/ Poly

Remote Type

Onsite

Time Type

Full time

Description & Requirements

Unlock the secrets of intelligence with MANTECH! Join a dynamic team at the forefront of national security, providing advanced solutions to government intelligence agencies. Since 1968, we've been solving the toughest challenges with groundbreaking tech. Explore thrilling projects in Digital Transformation, Cybersecurity, IT, Data Analytics and Software Development. Elevate your career and make a difference. Your adventure begins now-unleash your potential with MANTECH!

MANTECH seeks a motivated, career and customer-oriented Systems Administrator to join our team in San Antonio, TX.

The Linux Systems Administrator will support the Linux Orchestration Services (LOS) team, serving as the standard of excellence for enterprise Linux solutions while overseeing the design, implementation, and maintenance of mission-critical cloud-compute infrastructure and automation workflows.

Responsibilities include but are not limited to:

• Analyzing technical challenges to develop, implement, and maintain sound technical solutions across enterprise environments.
• Designing, building, and optimizing information technology frameworks, cloud-compute infrastructure, and core operating environments.
• Guiding IT projects from conception to completion to ensure full compliance with established project requirements and enterprise IT architecture.
• Maintaining in-depth technical knowledge of emerging and existing products, cloud technologies, and systems architectures.
• Collaborating closely with internal engineering teams, leadership, and external constituents to share knowledge and drive mission success.
• Troubleshooting complex system issues to resolve operational incidents and conducting thorough root cause analysis.

Minimum Qualifications:

• 7+ years of relevant Systems Administration (SA) experience
• Experience with multi-platform imaging
• Linux administration experience
• Proficiency in systems automation and orchestration leveraging scripting capabilities in Python, Bash, or PowerShell.
• Current DoD 8140 IAT Level II certification (e.g., Security+ CE, CySA+, CCNA-Security, GICSP, GSEC, CND, or SSCP) upon start of employment.
• PXE and Kickstart configurations experience to automate across Linux and Windows terminals

Preferred Qualifications:

• Bachelor's degree in a technical discipline with ten (10) years of Systems Administration experience, or five (5) additional years of SA experience in lieu of a degree.
• Demonstrated expertise writing, configuring, and deploying Ansible Playbooks, Ansible Automation Platform (AAP), Red Hat Satellite, and Red Hat Image Builder.
• Hands-on experience with cloud and virtualization technologies including AWS (Lambda), Microsoft Azure, VMware (vSphere), and OpenStack.
• Familiarity with Agile practices utilizing JIRA for backlog and sprint management, combined with Git version control workflows (GitLab/GitHub).

Clearance Requirements:

• Must possess an active Top Secret/SCI clearance with Polygraph.

Physical Requirements:

• The person in this position must be able to remain in a stationary position 50% of the time.
• Occasionally move about inside the office to collaborate with team members, operate standard office automation equipment, and engage in virtual communication.

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 careers@mantech.com and provide your name and contact information.