Senior Linux Systems Administrator

MANTECH seeks a motivated, mission-focused Senior Linux Systems Administrator to join our team in Chantilly, VA This opportunity allows you to become part of a diverse and innovative team supporting national security priorities in a collaborative, Big Data-driven environment. You will contribute to complex systems involving infrastructure, application development, data science, and advanced analytics—helping to drive impactful solutions in support of critical government missions. As a Senior Linux Systems Administrator, you will help maintain and enhance the Sponsor’s Linux environment alongside a talented team. You will be responsible for the operating system software and its seamless integration with hardware and applications across the organization. Responsibilities include, but are not limited to:Planning, testing, installing, integrating, and maintaining new and upgraded versions of the relevant operating systems; building and hardening Linux servers, and establishing configuration baselinesApplying all appropriate security and firmware patches in a timely manner, and assisting in creating, maintaining, and adhering to the organization’s patch management plansDeveloping test plans and procedures; testing and integrating software and hardware; replacing server hardware components where necessaryManaging operating system lifecycles and designing interfaces to external systemsEstablishing, developing, testing, staging, and operating environments; troubleshooting operating system problems, and collaborating with other teams (e.g. application development, network, etc.) to resolve problems across the organizationResearching and resolving operating system problems efficiently and accurately, while adhering to organizational standards and practices; maintaining and updating documentation on the operating system configuration and all other areas of responsibilityProviding technical support to other teams (e.g. application development, etc.) on requirements for integration into the operating systemStrong communication and collaboration skills to work effectively and proactively across a large organization of dispersed teams (added this from min quails since it’s not quantifiable). Minimum Qualifications:High School Diploma with 7+ years configuring and maintaining Linux serversExperience creating, maintaining, and communicating complex information technology documentation and experience applying security patches in a Linux environment; ability to manage a large, complex server environmentExperience with domain account management, particularly via Centrify, LDAP, and Active DirectoryStrong shell scripting experience and experience with the server environment, its hardware components and how/where they are used Preferred Qualifications:Scripting experience with Ansible or similar technologiesUnderstanding how to troubleshoot and replace server hardware if necessary Clearance Requirements:An active/current TS/SCI with Polygraph is required. Physical Requirements:Use hands to operate a computer and other office productivity machinery, such as a calculator, copy machine and computer printer.The person in this position needs to occasionally move about inside the office to access file cabinets, office machinery, etc.Constantly positions self to maintain computers in the lab, including under the desks and in the server closet

Created: 2025-08-29