Staff System Administrator

About the role

Amentum is seeking a Staff System Administrator to support a program providing integrated voice, video and data services across the IT lifecycle. The role works independently or within a team, adapts quickly to new products and processes, and is scheduled 5 days a week (Monday to Friday) at 8 hours per day.

Key responsibilities

• Administer and maintain Windows server environments, including Active Directory, DNS, DHCP and Group Policy
• Manage virtualization platforms such as VMware and/or Hyper-V, and monitor system performance and security logs
• Apply critical updates and patches, implement backup and disaster recovery strategies, and ensure compliance with security standards
• Manage IP allocation, subnetting and VLANs, and collaborate with network engineers on LAN, WAN and Wi-Fi issues
• Support DNS and DHCP monitoring, firewall rule reviews, VPN and remote access planning, and troubleshooting of authentication failures
• Serve as main point of contact for customers, manage customer accounts, and provide multi-channel support via email, phone and remote access
• Track service requests, document network and hardware assets, and handle secure disposal of sensitive materials
• Use remote support tools for desktops and peripherals, and administer software deployments with Microsoft Endpoint Configuration Manager (MECM)
• Train end users, share updates with senior leadership, and take part in cross-functional projects

Required profile

• Active Top-Secret clearance with SCI or TS, with the ability to acquire SCI
• Minimum 4 years of relevant IT experience; preferred 4-8 years
• High school diploma; preferred bachelor's degree in an IT-related field
• Ability to work 40 hours per week, work overtime during peaks, and travel 25-40% within the continental United States
• One of the listed 8140 IAT Level II or III baseline certifications (e.g., CCNA Security, CASP CE, CISA, CISSP) or ability to obtain one before start date

Required skills

• Windows Server 2019, Active Directory, DHCP, DNS, Group Policy, PowerShell
• VMware (vCenter, vSAN), VMware ESXi, Citrix Virtual Desktop, Nutanix HCI
• Microsoft Endpoint Configuration Manager (MECM)
• Networking fundamentals and data protection/disaster recovery
• Preferred: ITIL v4, ServiceNow, Cisco IOS, SolarWinds, Remedy