System Administrator

General information

Requisition #

R69218

Locations

USA-VA-Quantico

Posting Date

07/13/2026

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 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 users
• Assist in administering and maintaining Windows servers, Windows Workstations, Virtual Machines, and other critical systems in an enterprise environment
• Use Microsoft Service Manager, Remedy, ServiceNow, or other ticketing system to create, update, monitor, and close tickets
• Diagnose and resolve technical hardware and software issues by conducting basic and tier II troubleshooting for servers, workstations, and applications within the Active Directory environment
• Assist and support with account creations, resetting passwords, troubleshooting system and network problems, installation of hardware and workstations, unlocking accounts, and transferring data
• Support Accreditation efforts, to include STIGS, POAMs, SAARs, and other critical Processes
• Update/Create documentation as needed (user guides, admin guides, knowledge base articles, FAQs, quick reference guides)

Minimum Qualifications:

• At least 3 years of related experience in Service Desk or System Administration roles.
• Meet DoD 8570 IAT Level II requirements
• Experience with Active Directory (user account creation, password resetting, PKI setup, group policy, etc.)
• Experience developing and maintaining system applications/security/network configurations
• Experience troubleshooting network performances issues
• Experience with the set-up, configuration, and support of internal and external networks

Preferred Qualifications:

• Knowledge of standard DoD and Marine Corps concepts, practices, and procedures.
• Active Directory, Group Policy, Linux OS, Networks, MS Exchange, MS Lync, SCCM, Service Manager, MS Hyper-V, MS SQL Server, Networked Printers/Services, Distributed File Services, Data Protection Manager, SMB, JavaScript, SharePoint
• PowerShell scripting using any/all the respective plugins related to the applicable technologies
• Working knowledge of DoD STIGs related to the applicable technologies and how to implement, mitigate, and write POAM statements

Clearance Requirements:

• Must have a current / active DoD Top Secret/SCI clearance

Physical Requirements:

• Must be able to remain in a stationary position 50%.
• Needs to occasionally move about inside the office to access file cabinets, office machinery, etc.

The projected compensation range for this position is $85,000.00-$141,600.00. 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 careers@mantech.com and provide your name and contact information.