ManTech seeks a motivated and career-oriented **Systems Administrator** with Linux expertise to join our team in **Laurel, MD** . You will be part of a dedicated team delivering enterprise infrastructure capabilities for a global workforce that supports a wide range of national defense missions. This role directly supports the Enterprise Infrastructure Services (EIS) organization—the foundation of all Enterprise Information Technology (EIT) for MPO. **Responsibilities include, but are not limited to:** + Support the implementation, troubleshooting, and maintenance of IT systems + Provide Tier 1 (Help Desk) and Tier 2/3 (Escalation) support for problem identification, diagnosis, and resolution + Identify and resolve performance and capacity issues in Linux systems, and support hardware-related problem resolution and dispatching + Deliver detailed analysis and feedback to agency management and internal customers for escalated tickets + Configure, script, and manage Linux, Unix, and Windows operating systems + Install operating system software, troubleshoot system issues, maintain system integrity, configure network components, and implement OS enhancements to improve reliability and performance **Minimum Qualifications:** + Fifteen (15) years of experience as a System Administrator in programs and contracts of similar scope, type, and complexity + Bachelor’s degree in a technical discipline from an accredited college or university + Five (5) additional years of System Administrator experience may be substituted in lieu of a Bachelor’s degree **Preferred Qualifications:** + Familiarity with Scanboy + Experience using LatteART **Clearance Requirements:** + Must have a current/active TS/SCI with Polygraph **Physical Requirements:** + The candidate should be able to move, carry, and deliver workstations from inside the office to customer desks + The person in this position must be able to remain in a stationary position 50% of the time + Must communicate with co-workers, management, and customers via email, phone, or virtual meetings, which may involve delivering presentations. Must be able to exchange accurate information in these situations. ManTech International Corporation, as well as its subsidiaries proactively fulfills its role as an equal opportunity employer. We do not discriminate against any employee or applicant for employment. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or status as a protected veteran. If you are a qualified individual with a disability and require a reasonable accommodation to apply for a position with ManTech through its online applicant system, please email us at careers@mantech.com and provide your name and contact information.