System Administrator (2026-0251)

Acclaim Technical Services•McLean, VA

4d•$140,000 - $160,000•Onsite

About The Position

Acclaim Technical Services (ATS) is seeking a System Administrator to support a client’s operational requirements in a challenging, dynamic setting in the Washington Metropolitan Area. The position requires an active TS/SCI with Polygraph security clearance. The role provides end-user and account support, system maintenance, data-transfer coordination, hardware support, troubleshooting, incident reporting, and coordination with the customer and team. Work is on site Monday through Friday, 0700–1600, with on-call support.

Requirements

At least 3 years of hands-on IT help desk, desktop support, or systems administration experience.
Experience creating and managing user accounts and resetting passwords, such as with Active Directory.
Experience applying operating-system and security patches on Windows workstations and laptops.
Experience running security and compliance scans and remediating findings.
Experience installing, configuring, and replacing workstations, monitors, and network switches.
Working knowledge of network troubleshooting, including TCP/IP, DNS, DHCP, and switching.
Experience using a ticketing system to log, track, and communicate issues.
Strong written communication skills for weekly status reports and incident reports.
Ability to work on site from 0700 to 1600, Monday through Friday, and provide on-call support.
Ability to lift and move IT equipment such as workstations and monitors.
Active TS/SCI with Polygraph security clearance.

Nice To Haves

CompTIA Security+ or equivalent DoD 8140/8570 IAT Level II certification.
CompTIA A+ and/or Network+ certification.
Experience supporting government or defense customers, including classified or isolated networks.
Familiarity with secure data-transfer procedures between networks and standalone systems.
Experience with compliance and vulnerability scanning tools such as ACAS/Nessus or SCAP/STIG Viewer.
Experience with patch management tools such as WSUS, SCCM/MECM, or Intune.
Experience with hardware tech-refresh projects and asset inventory.
Experience operating scanners and document-digitization workflows.
Experience supporting meetings and A/V setup for technical exchange meetings.
Comfort working as a subcontractor alongside a prime contractor and the end customer.
Active security clearance, if required by the contract.

Responsibilities

Serve as the customer-support IT point of contact; set up user accounts, reset passwords, and resolve day-to-day IT issues.
Apply system and security patches and run security and compliance scans.
Support customer needs, including technical exchange meetings (TEMs) and digitizing hardcopy material by scanning.
Act as the primary point of contact for moving data on and off customer systems and networks, including standalone machines and laptops.
Assist with hardware recapitalization, setup, and replacement at the customer site, including monitors, workstations, and network switches.
Provide operations and maintenance for standalone machines and laptops, including patching, required scans, and setup.
Provide first-line network and system troubleshooting.
Coordinate customer and team responses on site during troubleshooting, outages, and upgrades.
Use approved notification systems, such as ticketing systems and email, to notify the customer and team about systems in or related to supported programs.
Write incident reports and follow up during and after incidents, events, and responses.
Coordinate tasking outside the scope of work with the customer.
Perform additional IT support tasks as required.