Systems Administrator

About the role

General information Requisition # R70542 Locations USA-VA-Chantilly Posting Date 09/14/2026 Security Clearance Required TS/SCI Remote Type Onsite Time Type Full time Description & Requirements Shape the future of defense with MANTECH! Join a team dedicated to safeguarding our nation through advanced tech and innovative solutions. Since 1968, we’ve been a trusted partner to the Department of Defense, delivering cutting-edge projects that make a real impact. Dive into exciting opportunities in Cybersecurity, IT, Data Analytics and more. Propel your career forward and be part of something extraordinary. Your journey starts now—protect and innovate with MANTECH! MANTECH seeks a motivated, career and customer-oriented Windows Systems Administrator to join our team in Chantilly, VA. This is an onsite position. The administrator will support the installation, operation, and maintenance of all current and future Information Systems. Duties and responsibilities involve the administration of Windows servers, Windows workstations, Terminal Servers, File & Print servers, organization folders, system documentation, analyzing and troubleshooting system anomalies, and ensuring optimal Information System performance.  This position is a part of a centralized team of systems administrators.  Responsibilities include, but are not limited to:   Maintain/troubleshoot customer Windows workstations, both on-site and remotely Perform Windows system administrative support to include adding and removing users, performing file restores, installing software, and assisting users daily Perform remote troubleshooting through diagnostic techniques and questions Determine the best solution to resolve tickets based on the issue and details provided by customers Properly escalate unresolved queries to the next level of support Track, route, and redirect problems to correct resources Follow standard operating procedures; accurately log all tickets using the defined tracking software Walk customers through problem solving process to ensure proper incident and request recording, documentation, and closure Responsible for day-to-day coordination and administration of tasks by ensuring quality and productivity standards are maintained while meeting customer schedules Assist with writing manuals and other documentation Utilize excellent customer service skills and exceed customers’ expectations Minimum Qualifications:   Bachelor’s degree in computer science or related field with 1+ years of experience in Information Technology. An associates degree with 3 years of experience, or high school with 6 years of experience can be substituted for a degree. Experience with Microsoft Windows 2008/2012/2016 (or more recent) Servers  Experience with Microsoft Windows 10 Experience with Microsoft Office 2007/2010/2016 Experience with vSphere, Horizon View, data backups, and antivirus software Basic networking experience, including TCPIP Experience with deploying workstation images or zero clients. Experience using a Service Desk ticketing system, such as Remedy or ServiceNow DoD 8570 IAT Level II Certification, ex., Security+ CE DoD 8570 Computing Environment Certification required within 6 months of hire, ex., MCSA, VCP, or equivalent Preferred Qualifications:   ITIL Foundations or later certification highly desired. Willingness to work after normal duty hours (nights and weekends) as needed. Previous customer service experience strongly desired. Clearance Requirements:   Must have a current and active TS/SCI clearance and be willing and able to obtain a poly Physical Requirements:   The person in this position must be able to remain in a stationary position 50% of the time.  Occasionally move about inside the office to access file cabinets, office machinery, or to communicate with co-workers, management, and customers, via email, phone, and or virtual communication, which may involve delivering presentations. The projected compensation range for this position is $71,400.00-$118,700.00. There are differentiating factors that can impact a final salary/hourly rate, including, but not limited to, Contract Wage Determination, relevant work experience, skills and competencies that align to the specified role, geographic location (For Remote Opportunities), education and certifications as well as Federal Government Contract Labor categories.  In addition, MANTECH invests in its employees beyond just compensation.  MANTECH’s benefits offerings include, dependent upon position, Health Insurance, Life Insurance, Paid Time Off, Holiday Pay, short-term and long-term Disability, Retirement and Savings, Learning and Development opportunities, wellness programs as well as other optional benefit elections. MANTECH considers all qualified applicants for employment without regard to disability or veteran status or any other status protected under any federal, state, or local law or regulation. If you need a reasonable accommodation to apply for a position with MANTECH, please email us at and provide your name and contact information.