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# System Administrator

- **Company:** Mantech International Corporation
- **Location:** Quantico, VA, United States
- **Experience:** Experienced
- **Contract:** Permanent contract
- **Skills:** JavaScript (Programming Language), Multitier Architecture, Microsoft Windows, Active Directory, Software Applications, Linux, Distributed File Systems, Microsoft Exchange Server, Hyper-V, Issue Tracking Systems, Network Troubleshooting, Microsoft Lync, Microsoft SQL Server, System Center Configuration Manager, Windows Servers, Network Configuration and Change Management, Public Key Infrastructure, Windows PowerShell, Microsoft SharePoint, Software Engineering, Virtual Machines, Servicenow
- **Published:** November 5, 2026
- **Apply:** https://www.clearancejobs.com/jobs/9290139/system-administrator

## About the Role

* 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:

 * A current/active 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.

## Description

* 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)