Linux System Administrator

MANTECH•Laurel, MD

8d•$128,000 - $214,400•Onsite

About The Position

MANTECH is seeking a motivated, customer-oriented Linux System Administrator to join its team in Laurel, Maryland. The position is part of the Enterprise Infrastructure Services organization and supports the enterprise IT backbone, providing data center and compute capabilities across non-standard enclaves for a global workforce. The administrator partners with customers, Integrated Product Teams, and vendors to support defense missions. The role provides enterprise infrastructure administration across Linux and Windows platforms, hybrid environments, virtual desktop and application virtualization systems, storage, and network components. It includes day-to-day operations, proactive monitoring, incident resolution, patching, automation, and end-user support. The position is onsite Monday through Friday and requires participation in an on-call rotation. An active TS/SCI clearance with Polygraph is required.

Requirements

Bachelor’s degree and 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, using automation tools such as Ansible or Puppet.
Proficiency managing VDI and application virtualization environments using Omnissa Horizon (formerly VMware Horizon).
Hands-on experience using automation frameworks such as SaltStack to automate system deployments and maintain state enforcement across hybrid infrastructure.
Active DoD 8140 / IAT Level II certification, such as Security+ CE, CCNA-Security, CySA+, CND, Network+ CE, GICSP, GSEC, or SSCP; or ability to obtain one within 60 days of hire.
Active TS/SCI clearance with Polygraph.
Ability to remain stationary 50% of the time.
Ability to move, carry, and deliver workstations and IT hardware from the office to customer workspaces.
Ability to communicate and exchange accurate information with coworkers, management, and customers, including through technical briefings and presentations.
Availability for onsite work Monday through Friday and participation in an on-call rotation.

Nice To Haves

Experience configuring and using operational monitoring dashboards such as SCANBOY or LatteArt.
Familiarity with systems engineering and operational administration within classified mission enclaves.
Collaborative problem-solving skills across multidisciplinary engineering teams to streamline deployments, system patching, and hardware integrations.

Responsibilities

Analyze and resolve complex problems involving server hardware, applications, and operating systems across Linux, Windows 10/11, and Windows Server environments.
Use automated configuration management and deployment tools such as Ansible, Puppet, and SaltStack to enforce system state and consistency across hybrid infrastructure.
Install, configure, troubleshoot, and maintain network components, systems, and operating system enhancements to optimize reliability and performance.
Provide day-to-day operational support, proactive monitoring, and incident resolution for enterprise client, server, and network devices.
Manage Omnissa Horizon (formerly VMware Horizon) environments for virtual desktop infrastructure (VDI) and application virtualization.
Administer NetApp storage systems, support enterprise patching lifecycles, and resolve tier-level hardware and system challenges.
Provide help desk and end-user support across all technical tiers, in person and by phone.