Systems Administrator

Amentum is seeking a Windows Systems Administrator to support our federal program in Warrenton, VA. Our mission is to operate and maintain the Distributed Continuity Integrated Network - Top Secret Enterprise Services (DCIN-TS ES). The DCIN-TS ES is a DoD provided, TS//SCI, integrated voice, video, and data, global communications network that facilitates collaboration among senior leaders and key staff.

Responsibilities:

• Administer and maintain Windows server environments, including Active Directory, DNS, DHCP, and Group Policy
• Manage and support virtualization platforms such as VMware and/or Hyper-V
• Monitor system performance, review security logs, and apply critical updates and patches
• Implement robust backup strategies and disaster recover solutions
• Manage IP address allocation, subnetting, and VLAN configurations
• Collaborate with network engineers to diagnose and resolve LAN, WAN, and Wi-Fi connectivity issues
• Monitor critical network services like DNS and DHCP to ensure consistent system functionality
• Assist in reviewing firewall rules to support secure access to Windows servers
• Contribute to the planning and deployment of VPNs, remote access solutions, and network segmentation strategies
• Troubleshoot shared infrastructure issues, including domain name resolution and authentication failures
• Serve as a primary point of contact for customer issues by diagnosing, resolving, and tracking problems

• Manage and maintain customer accounts, including establishment, updates, and repairs, while identifying opportunities to improve customer service processes
• Provide responsive, multi-channel support (via email, phone, and remote access) to end-users, delivering timely troubleshooting and problem resolution
• Ensure high-quality customer experience through consistent and effective communication
• Respond to service requests and oversee the lifecycle tracking, documentation, and reporting of network systems and hardware assets
• Ensure compliance with disposal protocols, including the secure destruction of sensitive materials
• Utilize industry-standard tools to deliver remote support for desktop and peripheral devices, efficiently resolving technical issues while minimizing system downtime
• Maintain accurate records of technical incidents and service requests, escalating complex or unresolved issues according to established escalation procedures and organizational policies
• Administer enterprise software deployments using tools such as Microsoft Endpoint Configuration Manager (MECM), ensuring streamlined, secure, and automated application rollouts across all relevant systems
• Provide training and guidance to end-users to enhance technology adoption and efficiency
• Regularly communicate key updates, insights, and technical recommendations to senior leadership to support informed decision-making
• Continuously research and evaluate emerging technologies, tools, and best practices to maintain current expertise and ensure the organization benefits from up-to-date knowledge in relevant IT domains
• Actively participate in cross-functional and special projects, bringing technical insight and operational support to ensure successful outcomes aligned with organizational objectives

Requirements:

• Active Top-Secret clearance with SCI or TS with the ability to acquire SCI
• High School Diploma plus 7 years of relevant experience
• Must possess one of the following 8140 IAT Level II or III baseline certifications:
  o Level II certs include - CCNA Security, GISCP, GSEC, Security+ CE, SSCP
  o Level III certs include - CASP CE, CCNP Security, CISA, CISSP (or Associate), GCED, GCIH
• Minimum 7 years of relevant Information Technology Experience
• Demonstrated experience administering enterprise software deployments using tools such as Microsoft Endpoint Configuration Manager (MECM)
• Hands-on experience with enterprise technologies, including Windows Server 2019, Citrix Virtual Desktop, VMware ESXi, Active Directory, DHCP, and Service Accounts
• Strong command of Group Policy for centralized management of user and computer settings across the domain
• Skilled in using PowerShell to automate administrative tasks and enhance system management efficiency
• Hands-on experience in VMware (vCenter, vSAN) and Nutanix Hyperconverged Infrastructure, including architecture, deployment, and the use of integrated management tools for efficient data center operations
• Solid understanding of networking principles, protocols, and configuration best practices to ensure secure, reliable, and high-performing IT environments
• Demonstrated experience implementing and managing data protection strategies and disaster recovery solutions to ensure business continuity and data integrity
• Familiarity with MS Office applications such as Excel, Word, Outlook, SharePoint, Project and Visio

Preferred:

• Bachelor's degree in IT or related STEM field
• Experience with ServiceNow
• Microsoft Certified: Windows Server Hybrid Administrator Associate
  CompTIA Network+ or Cisco CCNA for foundational networking knowledge

Must be able to work a 40-hour work week, normally Monday through Friday

Ability to work overtime during critical peaks and be available to meet last minute requests for overtime if needed

Ability to travel (25-40%) primarily within 75 miles

Compensation Details:
$120K - $140K

The compensation range or hourly rate listed for this position is provided as a good-faith estimate of what the company intends to offer for this role at the time this posting was issued. Actual compensation may vary based on factors such as job responsibilities, education, experience, skills, internal equity, market data, applicable collective bargaining agreements, and relevant laws.

Benefits Overview:

Our health and welfare benefits are designed to support you and your priorities. Offerings include:

• Health, dental, and vision insurance
• Paid time off and holidays
• Retirement benefits (including 401(k) matching)
• Educational reimbursement
• Parental leave
• Employee stock purchase plan
• Tax-saving options
• Disability and life insurance
• Pet insurance

Note: Benefits may vary based on employment type, location, and applicable agreements. Positions governed by a Collective Bargaining Agreement (CBA), the McNamara-O'Hara Service Contract Act (SCA), or other employment contracts may include different provisions/benefits.

Original Posting:
01/09/2026 - Until Filled
Amentum anticipates this job requisition will remain open for at least three days, with a closing date no earlier than three days after the original posting. This timeline may change based on business needs.

Amentum is proud to be an Equal Opportunity Employer. Our hiring practices provide equal opportunity for employment without regard to race, sex, sexual orientation, pregnancy (including pregnancy, childbirth, breastfeeding, or medical conditions related to pregnancy, childbirth, or breastfeeding), age, ancestry, United States military or veteran status, color, religion, creed, marital or domestic partner status, medical condition, genetic information, national origin, citizenship status, low-income status, or mental or physical disability so long as the essential functions of the job can be performed with or without reasonable accommodation, or any other protected category under federal, state, or local law. Learn more about your rights under Federal laws and supplemental language at Labor Laws Posters .