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.