Windows Server Administrator

General information

Requisition # R69754 Locations USA-VA-Quantico Posting Date 08/03/2026 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 SERVER ADMINISTRATOR to join our team in QUANTICO, VA. 

Responsibilities include but are not limited to:

• Installing, configuring, and maintaining Windows Server operating systems (2016, 2019, 2022) while monitoring server performance and optimizing resource utilization.
• Managing Microsoft Active Directory Domain Services (AD DS), including domain controllers, user/group management, DNS, DHCP, and complex Group Policy Object (GPO) creation and deployment.
• Administering virtualized server environments utilizing VMware vSphere/ESXi or Microsoft Hyper-V to ensure scalable and resilient infrastructure.
• Planning and executing automated patching, software updates, and OS deployments using Microsoft Endpoint Configuration Manager (MECM/SCCM) and Windows Server Update Services (WSUS).
• Hardening Windows servers in strict accordance with Defense Information Systems Agency (DISA) Security Technical Implementation Guides (STIGs) and remediating vulnerabilities identified by ACAS/Nessus scans.
• Maintaining enterprise backup solutions, ensuring data integrity, and participating in Disaster Recovery (DR) and Continuity of Operations (COOP) planning and testing.

Minimum Qualifications:

• Bachelor’s degree and at least 2 years in Information Systems Security.  A total of 8 years’ experience required without a degree.
• Demonstrated experience navigating the Sponsor's accreditation process and ICD 503 standards, including A&A Body of Evidence (BOE) creation.
• Proven experience meeting security requirements in the Sponsor's environment or similar enterprise environments.
• Experience collaborating across large teams to drive security initiatives and manage complex, integrated system data flows.
• Experience with complex network inventorying and network documentation (compliance, configuration management, patching, centralized authentication).
• Strong capability to create, maintain, and communicate technical, network, and security documentation.

Preferred Qualifications:

• Certified Information Systems Security Professional (CISSP) certification.
• Experience with the Sponsor’s primary cyber risk and compliance automation tools.
• Proactive self-starter with excellent interpersonal skills, capable of working across teams and driving organizational change.

Clearance Requirements:

• Must have an active current TS/SCI security clearance

Physical Requirements:

• Must be able and willing to perform occasional manual labor and warehouse duties, with the ability to lift up to 50 pounds.
• Must be able to remain in a stationary position 50% of the time.

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.