MANTECH seeks a motivated, career and customer-oriented Systems Administrator to join our team USMC IT Service Desk in Stafford, VA. Responsibilities include but are not limited to: Maintain multiple networks for over 600 usersAssist in administering and maintaining Windows servers, Windows Workstations, Virtual Machines, and other critical systems in an enterprise environmentUse Microsoft Service Manager, Remedy, ServiceNow, or other ticketing system to create, update, monitor, and close ticke