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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Systems Administrator (Windows/Linux) - **Company:** Command Post Technologies - **Location:** Arlington, VA, United States - **Experience:** Experienced - **Contract:** Permanent contract - **Skills:** Microsoft Windows, Active Directory, Automation of Tests, Backup Devices, Bash Shell, Ubuntu (Operating System), Configuration Management, Software Documentation, CompTIA Security+, Computer Networks, System Configuration, Linux, Disaster Recovery, Domain Name System (DNS), VMware ESX Servers, Monitoring of Systems, Hyper-V, IT Management, Python (Programming Language), Linux Servers, Microsoft Software, Windows Servers, Networking Basics, Windows PowerShell, Red Hat Enterprise Linux, Security Content Automation Protocol, Service Pack, Systems Integration, TCP/IP, Virtual Machines, Virtualization Technology, VMware VSphere, Software Vulnerability Management, Scripting, Enterprise Software Applications, System Availability, Vcenter, Patch Management, Server Operating Systems & Platforms, User Administration - **Published:** November 10, 2026 - **Apply:** https://www.clearancejobs.com/jobs/9301495/systems-administrator-windowslinux ## About the Role * Final DoD Secret security clearance, with the ability to meet additional task-order security requirements. * Minimum of 3 years of relevant experience in systems administration, server infrastructure management, or enterprise IT operations. * Hands-on experience administering Windows Server and/or Linux operating systems in an enterprise environment. * Experience installing, configuring, patching, monitoring, and troubleshooting server operating systems and applications. * Working knowledge of networking fundamentals, including TCP/IP, DNS, and enterprise network connectivity. * Familiarity with virtualization technologies such as VMware vSphere, Microsoft Hyper-V, or comparable platforms. * Experience supporting user account management, access permissions, and system security configurations. * Familiarity with backup and recovery procedures, system maintenance, and technical documentation. * Ability to diagnose and resolve technical issues independently and collaborate with engineering and cybersecurity teams., * Experience administering systems within classified DoD or Intelligence Community environments. * CompTIA Security+, Microsoft, Red Hat, Linux Foundation, or comparable systems administration certification. * Experience with Microsoft Active Directory, Group Policy, Windows Server, and enterprise authentication services. * Experience with Red Hat Enterprise Linux (RHEL), Ubuntu, or other enterprise Linux distributions. * Experience managing VMware vSphere, ESXi, vCenter, or comparable virtualization infrastructure. * Familiarity with DISA STIGs, ACAS, ESS/HBSS, SCAP, and DoD system hardening requirements. * Experience developing automation scripts using PowerShell, Bash, Python, or similar scripting languages. * Familiarity with configuration management, system monitoring, and automated patch management tools. * Experience supporting enterprise application deployment, server migrations, or infrastructure modernization. * Prior experience supporting DARPA or another DoD research and development organization. Work Location and Schedule Anticipated work location is Arlington, VA. Specific onsite requirements, work schedules, after-hours support, and travel will be determined by individual task orders. This requisition supports anticipated task-order opportunities under an awarded contract vehicle. Employment is contingent upon task-order award, funding, and position availability. ## Description Command Post Technologies, Inc. (CPT) is seeking Systems Administrators for anticipated opportunities supporting the Defense Advanced Research Projects Agency (DARPA) in Arlington, Virginia. The selected candidate will support the installation, configuration, administration, maintenance, and security of enterprise information systems across classified and unclassified environments. This position requires experience supporting Windows and/or Linux servers, enterprise applications, virtualization technologies, and associated infrastructure. Candidates should possess strong troubleshooting skills, familiarity with DoD cybersecurity requirements, and experience maintaining secure, reliable, and operationally available systems in complex enterprise environments., * Install, configure, administer, maintain, and troubleshoot Windows and/or Linux server environments and supporting enterprise applications. * Perform system administration activities including account management, access control, software installation, patch management, and system configuration. * Monitor system availability, performance, resource utilization, and operational health to identify and resolve technical issues. * Support administration and maintenance of virtualization platforms, virtual machines, and associated server infrastructure. * Implement and maintain secure system configurations in accordance with applicable DoD cybersecurity policies and DISA Security Technical Implementation Guides (STIGs). * Apply operating system updates, security patches, and approved configuration changes to maintain system security and operational readiness. * Support Active Directory, Group Policy, DNS, and other enterprise infrastructure services as applicable. * Troubleshoot operating system, application, and server connectivity issues and coordinate resolution with network engineering and cybersecurity personnel. * Perform system backup, restoration, and recovery activities to support data protection and continuity of operations. * Assist with system integration, migration, deployment, and modernization initiatives involving enterprise IT infrastructure. * Support vulnerability management and continuous monitoring activities by identifying, documenting, and remediating system security findings. * Develop and maintain system documentation, configuration baselines, standard operating procedures, and technical support records. * Support testing, evaluation, and implementation of new technologies, applications, and services within approved environments.