Systems Administrator with Security Clearance

Overview Abacus Technology is seeking a Systems Administrator to provide technical support for the US Air Force Office of Special Investigations (AFOSI) in Quantico. This is a full-time position. Responsibilities * Plan, install, and maintain computer systems, including physical and virtual servers, storage area networks and network attached storage on five enclaves. * Install, maintain, and troubleshoot server hardware. * Troubleshoot Domain Controllers. * Perform performance monitoring and tuning, upgrades and patching, backup and recovery, as well as troubleshooting and problem resolution. * Develop and maintain schedules and plans for system updates and patching. * Create accounts and groups in Active Directory and create and modify Group Policy Objects. * Report on system uptime and SLA performance. * Audit server utilization. * Assist in building, coordinating, maintaining, changing, and updating, the Risk Management Framework (RMF) Assessment and Authorization (A&A) packages for the five enclaves administered by AFOSI. * Ensure that all application deliverables and systems comply with applicable DISA STIGs or Security Requirements Guidance. * Identify and report system risks. Qualifications * 3 years experience in systems administration in a Windows based environment. * Bachelor's degree in a related field desired. * Must be certified at IAT Level II (e.g., Security, or other certification satisfying DoD 8570 certification requirements). Microsoft certification a plus. * Strong knowledge of Microsoft Windows technologies, including Active Directory, Windows Administration, scripting, and Windows configuration techniques. * Experience with Windows Server 2016, 2019, and 2022; MS SQL Server 2016 and 2019; and VMWare ESXi, vCenter, and vSAN, and Horizon. * Experience administering servers in a virtualized production environment using VMWare vSphere 7.x or 8.x technology. * Experience with PowerShell for command line and scripting to include scripting for account management, patch deployment, software inventory, service control, and/or object attribute modification. * Experience installing, configuring, and maintaining servers with Microsoft Windows. * Experience with rack mounted or blade server hardware. * Experience with Active Directory to include creating accounts and groups and navigating a domain tree * Experience creating and modifying Group Policy Objects. * Experience managing and troubleshooting DNS functions. * Knowledge of DHCP server functionality. * Experience troubleshooting Domain Controllers and familiarity with replication issues. * Experience with a trouble ticket system such as Remedy or ServiceNow. * Experience with security as it pertains to server infrastructure, desktops, laptops, servers, firewalls, routers, and intrusion detection systems (IDS). * Experience with a backup solution, hands-on experience with backup and restore procedures, and disaster recovery planning. * Must have experience with RMF and applying STIGs. * Working knowledge of IT Systems Maintenance Compliance processes to include information assurance vulnerability management (IAVM). * Experience creating, reviewing, and revising security documentation and artifacts. * Strong understanding of network fundamentals to include TCP/IP and sub-nets desired. * Experience with Storage Area Networks desired. * Experience with DoD IT environment and networks. * Excellent communication skills, both oral and written, analytical skills to troubleshoot issues, and an ability to conceptualize server infrastructures and configurations. * Must be a US citizen and hold a current Top Secret clearance with SCI access (TS/SCI). Applicants selected will be subject to a U.S. government security investigation and must meet eligibility requirements for access to classified information. EOE/M/F/Vet/Disabled

Location: Quantico, Virginia, US

Posted Date: 11/13/2025