Systems Administrator (Windows/Linux)

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. Key Responsibilities 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. Requirements 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. Desired Qualifications 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. About us: We are Command Post Technologies, Inc. (CPT). CPT is a Service-Disabled, Veteran-Owned Small Business (SDVOSB), providing engineering services in the areas of Cyber Security, Software Development, Test & Evaluation, and Strategic Planning. CPT employees appreciate working in a caring environment that promotes a healthy work-life balance. As individuals, we come together as a team, supporting a culture rooted in our core principles of integrity, determination, and innovation. In all of CPT’s collaboration efforts, our team prioritizes communication, accountability, and being resourceful in order to maximize efficiency and results. What’s In It for You Great health benefits (for more info contact us directly) Leadership training 401k with generous company matching Employee Stock Ownership Plan (ESOP) Career professional development Tuition reimbursement Flexible hours Work/Life balance Rewards and recognition Paid Time Off Parental Leave Command Post Technologies, Inc. (CPT) is a Service-Disabled Veteran-Owned Small Business (SDVOSB) founded in 2008 and headquartered in Suffolk, VA with personnel in various states including Virginia, Maryland, Florida, and Texas. With 2/3 of our staff being former military, CPT firmly believes in employing veterans. Command Post Technologies, Inc. is a unique provider of innovative solutions that enhance our corporate clients’ productivity and empower our government clients with the ability to protect against all enemies: foreign and domestic. CPT adapts its successful military experiential approach to the needs of leaders in a global business environment and provides an elite leadership curriculum that results in a world-class, leadership-altering event. Command Post Technologies Inc. (CPT) is an Equal Employment Opportunity and Affirmative Action employer. We consider applicants without regard to race, color, religion, age, national origin, ancestry, ethnicity, gender, gender identity, gender expression, sex, sexual orientation, marital status, veteran status, disability, genetic information, citizenship status, or membership in any other group protected by federal, state, or local law. We take Affirmative Action to ensure equal opportunities for employees and potential employees without regard to race, color, religion, age, national origin, ancestry, ethnicity, gender, gender identity, gender expression, sex, sexual orientation, marital status, veteran status, disability genetic information, citizenship status, or membership in any other group protected by federal, state, or local law. We abide by the Pay Transparency Nondiscrimination Provision and will refrain from discharging or otherwise discriminating against employees or applicants who inquire about, discuss, or disclose their compensation or the compensation of other employees or applicants. An exception exists where the employee or applicant makes the disclosure based on information obtained while performing his or her essential job functions.