Linux Systems Administrator

LinTech Global•Frederick, MD

About The Position

Dexian Government Solutions is recruiting a Linux Systems Administrator to support its contract at the USAMRIID in Fort Detrick, Maryland. USAMRIID is a DoD maximum-containment laboratory that develops and evaluates medical countermeasures, rapid diagnostics, and biodefense expertise. This hands-on role supports mission-critical infrastructure across Linux, virtualization, enterprise storage, and high-performance computing (HPC) environments, and requires the ability to work independently with minimal ramp-up. The administrator will maintain Linux and related infrastructure, support enterprise storage and data-center operations, and administer HPC clusters and their associated schedulers, tools, and applications. The role also involves troubleshooting networks, servers, and applications; managing Active Directory and user support; monitoring performance and availability; maintaining procedures; and collaborating with government stakeholders and cross-functional teams. The position requires an active Secret security clearance, customer approval, an IAT II certification, and successful completion of a pre-employment background screening.

Requirements

At least 5 years of Linux systems administration experience.
Active Secret security clearance required to start.
IAT II certification required to start; CompTIA Security+ is given as an example.
Advanced knowledge of Linux operating systems, shell scripting, and command-line tools.
Familiarity with virtualization technologies such as VMware or KVM.
Solid understanding of networking protocols and troubleshooting.
Ability to resolve issues independently with minimal escalation.
The role requires customer approval and successful completion of a pre-employment background screening.

Nice To Haves

Familiarity with installing and troubleshooting Linux and Python applications.
Prior experience supporting development efforts.
Experience with enterprise platforms and tools listed in the duties, including VxRail, VMware/vCenter, Dell storage, backup and recovery solutions, HPC schedulers, container platforms, and monitoring tools.

Responsibilities

Install, configure, and maintain Linux (RHEL) systems.
Manage VxRail (VMware/vCenter) infrastructure and work to ensure 99.9% uptime.
Perform system hardening, STIG compliance, and patching across multiple networks.
Monitor system health, logs, and endpoint security tools such as CrowdStrike.
Support Windows Server 2019 and 2022 environments.
Design, implement, and maintain SAN/NAS file and block storage environments.
Manage enterprise storage platforms such as Dell Isilon (OneFS), ECS (Superna/Golden Copy), Dell Hyperconverged systems, EMC Unity, and Data Domain (IDPA).
Support backup and recovery solutions such as Avamar and Veeam.
Administer and support HPC clusters, including compute, head, and login nodes.
Manage HPC job schedulers such as SLURM and PBS and cluster provisioning tools such as Bright Cluster Manager.
Support Docker and Singularity container platforms.
Monitor and tune HPC performance across CPU, memory, I/O, and network resources.
Assist with installation and troubleshooting of open-source scientific and bioinformatics applications.
Develop and maintain SOPs for HPC operations and maintenance.
Provide technical guidance on HPC architecture, performance, and future enhancements.
Use HPC management tools such as Bright and iDRAC.
Troubleshoot network, server, and application issues, resolving more than 80% without escalation.
Troubleshoot connectivity across enterprise environments.
Manage Active Directory users, groups, and permissions in large environments.
Support DoD Enterprise Email and account-related issues.
Use monitoring tools such as PRTG, SolarWinds, or equivalent to help ensure system availability, performance, and reliability.
Contribute to task prioritization, status reporting, and operational planning.
Collaborate with government stakeholders and cross-functional teams.