MANTECH seeks a motivated, career-oriented **System Administrator** to join our team in **Hanover, Maryland** . **Responsibilities include, but are not limited to:** + Provide support for implementation, troubleshooting, and maintenance of Information Technology (IT) systems + Manage IT system infrastructure and processes related to those systems. + Deliver Tier 1 (Help Desk) and Tier 2 (Escalation) support for problem identification, diagnosis, and resolution for client/server/storage/network devices, mobile devices, etc + Optimize system operations, resource utilization, and perform system capacity analysis and planning + Conduct detailed troubleshooting and provide in-depth IT system support + Configure and manage UNIX and Windows operating systems; install/load OS software, maintain integrity, and configure network components + Administer and maintain compliance with customer system security requirements including updates, patching, and reporting on hardware and software components **Minimum Qualifications:** + Bachelor’s degree in a technical discipline from an accredited college or university; an additional 5 years of SA experience might be substituted for a degree + 10+ years of experience as a System Administrator (SA) on programs/contracts of similar scope, type, and complexity + Experience implementing, operating, and monitoring TS/SCI systems + Experience with automated data backup systems + Experience implementing and managing Linux/Windows environments + Experience managing virtualized platforms such as VMware ESXi or vSphere **Security Clearance Requirements:** + Active/Current TS/SCI with Polygraph **Physical Requirements:** + Must be able to bend, kneel, and reach as needed + Capable of lifting to 20 lbs. + Requires walking and performing repetitive motions + Able to perform sedentary tasks and use a PC and standard office tools for extended periods 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.