Systems Administrator

Peraton OverviewPeraton is a next-generation national security company that drives missions of consequence spanning the globe and extending to the farthest reaches of the galaxy. As the world’s leading mission capability integrator and transformative enterprise IT provider, we deliver trusted, highly differentiated solutions and technologies to protect our nation and allies. Peraton operates at the critical nexus between traditional and nontraditional threats across all domains: land, sea, space, air, and cyberspace. The company serves as a valued partner to essential government agencies and supports every branch of the U.S. armed forces. Each day, our employees do the can’t be done by solving the most daunting challenges facing our customers. Visit peraton.com to learn how we’re keeping people around the world safe and secure.ResponsibilitiesWe are seeking a skilled Systems Administrator with an active TS/SCI clearance to join our team supporting mission-critical operations. The ideal candidate will manage, maintain, and enhance secure Windows-based environments while ensuring uptime and performance for essential applications. The candidate will be working closely with IA team supporting Continuous Monitoring tasks, enforcing cybersecurity compliance, and addressing vulnerabilities identified through Nessus scans.This role involves configuring and maintaining Windows servers and desktops, implementing security mitigations, ensuring compliance with government standards, as well as lead assigned Classified IT Services(CITS) projects and work with CITS leadership to identify new technologies for new Peraton program contracts.Interacts with users and evaluates vendor products. Makes recommendations to purchase hardware and software, coordinates installation and provides backup recovery. Develops and monitors policies and standards for allocation related to the use of computing resources.Key Responsibilities:Continuous Monitoring & Vulnerability Mitigation:Perform continuous monitoring of systems using vulnerability scanning tools like Tenable Nessus.Identify and analyze vulnerabilities from weekly and monthly scans.Mitigate identified vulnerabilities by reconfiguring Linux servers and desktops or applying patches, security updates, and configuration changes.Track, document, and report vulnerability remediation activities to ensure ongoing compliance with Risk Management Framework (RMF) or Intelligence Community standards. Windows System Administration:Deploy, Configure, maintain, and secure Windows-based servers and desktops.Maintain the virtualization platform (VMWare).Manage Active Directory services, folder & file permissions, and management & compliance of Group Policies.Harden systems using existing guidelines such as Security Technical Implementation Guides (STIGs) or custom configurations.Monitor systems for performance, security, and availability, resolving issues proactively. Maintain system backup and disaster recovery procedures.Collaborate with cross-functional teams to support system integration and deployment efforts.Stay current with technological advancements and recommend improvements as necessary. Documentation & Auditing:Maintain detailed system configuration documentation.Document vulnerability findings, mitigations, and resolutions in tickets or compliance reports.Support security audits by providing technical information and collaborating with the Information Assurance teams. Collaboration:Work closely with the Information Assurance (IA) and Cybersecurity teams to ensure systems meet security requirements.Collaborate with network administrators and application teams to integrate Linux environments supporting enterprise solutions.QualificationsRequired:Active TS/SCI clearance with ability to obtain a polygraph (Polygraph preferred).Bachelor’s degree and 8 years of relevant experience, including 3–5+ years managing virtualized Windows environments within classified, secure environments. An additional 4 years of experience may be substituted in lieu of a degree.Understanding of system security requirements in DoD or Intelligence domains (e.g., STIGs, RMF).Preferred:Experience with virtualization technologies (VMware, Hyper-V, OpenShift).Exchange, SharePoint, MECM Soft Skills:Customer ServiceAbility to work in a fast-paced, high-security environment.Strong troubleshooting and problem-solving abilities.Effective communication skills and ability to document technical processes clearly.Target Salary Range$104,000 - $166,000. This represents the typical salary range for this position. Salary is determined by various factors, including but not limited to, the scope and responsibilities of the position, the individual’s experience, education, knowledge, skills, and competencies, as well as geographic location and business and contract considerations. Depending on the position, employees may be eligible for overtime, shift differential, and a discretionary bonus in addition to base pay.Benefits StatementPeraton offers eligible employees a variety of benefits including medical, dental, vision, life, health savings account, short/long term disability, EAP, parental leave, 401(k), paid time off (PTO) for vacation, and company paid holidays. A full listing of available benefits can be viewed at .Application StatementsThe application period for the job is estimated to be 30 days from the job posting date. However, this timeline may be shortened or extended depending on business needs and the availability of qualified candidates.By applying to this job, you are expressing interest in the role and the Company. During the review of your application, you may be required to participate in an on-camera interview, as well as participate in a process to verify your identity.Use of artificial intelligence (AI) tools of any kind during Peraton interviews is strictly prohibited unless the candidate has obtained prior written authorization. All interview responses must be the candidate’s own.EEOEEO: Equal opportunity employer, including disability and protected veterans, or other characteristics protected by law.Job SummaryRequisition ID: 2026-172660Position Category: Information TechnologyClearance: Top Secret/SCI w/Poly