Linux System Administrator

MANTECH seeks a motivated, career and customer-oriented a Linux System Administrator to join our team in Laurel, MD.

You will become an integral part of a diverse team that delivers enterprise infrastructure capabilities for a global workforce performing a wide range of missions in defense of our Nation. This role supports the Enterprise Infrastructure Services organization overseeing the Enterprise Information Technology (EIT) backbone platform, delivering data center and compute capabilities across non-standard enclaves in partnership with customers, Integrated Product Teams, and vendors.

Responsibilities include but are not limited to:

• Analyzing and resolving complex problems associated with server hardware, applications, and operating systems across Linux, Windows 10/11, and Windows Server environments.
• Utilizing automated configuration management and deployment tools such as Ansible, Puppet, and SaltStack to ensure state enforcement and consistency across hybrid infrastructure.
• Installing, configuring, troubleshooting, and maintaining network components, systems, and operating system enhancements to optimize reliability and performance.
• Providing comprehensive day-to-day operational support, proactive monitoring, and incident resolution for enterprise client, server, and network devices.
• Managing Omnissa Horizon (formerly VMware Horizon) environments to deliver high-performance Virtual Desktop Infrastructure (VDI) and application virtualization to end users.
• Administering NetApp storage systems, supporting enterprise patching lifecycles, and resolving tier-level hardware and system challenges.
• Delivering dedicated help desk and end-user support across all technical tiers, both in person and via phone.

Minimum Qualifications:

• Bachelor’s degree with 14+ years of relevant experience, or a High School Diploma and 19 years of relevant experience.
• Demonstrated experience configuring and managing Linux operating systems alongside Windows 10/11 and Windows Server platforms with automation tools such as Ansible or Puppet.
• Proven proficiency managing Virtual Desktop Infrastructure (VDI) and application virtualization environments utilizing Omnissa Horizon (formerly VMware Horizon).
• Hands-on experience leveraging automation frameworks such as SaltStack to automate system deployments and maintain state enforcement across hybrid infrastructure.
• Active DoD 8140 / IAT Level II certification (e.g., Security+ CE, CCNA-Security, CySA+, CND, Network+ CE, GICSP, GSEC, or SSCP), or ability to obtain within 60 days of hire.

Preferred Qualifications:

• Experience configuring and utilizing operational monitoring dashboards such as SCANBOY or LatteArt.
• Familiarity providing direct systems engineering and operational administration within classified mission enclaves.
• Strong collaborative problem-solving skills across multi-disciplinary engineering teams to streamline deployments, system patching, and hardware integrations.

Schedule:

• Core hours are 1000-1400 Monday through Friday to ensure team overlap, with attendance outside this window as needed to support meetings, deployments, and team activities.
• On-site coverage is scheduled between 0600-1800 Monday through Friday, coordinated among team members.
• Position is located on-site Monday through Friday in the Laurel, MD area.
• Participation in an on-call rotation is required.

Clearance Requirements:

• Must possess an active TS/SCI clearance with Polygraph.

Physical Requirements:

• Must be able to remain in a stationary position 50% of the time.
• Must be able to move, carry, and deliver workstations and IT hardware from inside the office to customer workspaces.
• Frequently communicates with co-workers, management, and customers via email, phone, and virtual communication, which may involve delivering technical briefings and presentations. Must be able to exchange accurate information in these situations.