Windows Systems Administrator

Job Description Seeking a career with a sense of purpose, work life balance, and growth opportunities? There’s a place for you at Leidos! We are currently seeking a Windows Systems Administrator to join the Compartmented Enterprise Services Office (CESO) effort. This program is establishing a modern secure web service (SWS) operation as part of a state-of-the-art, highly automated platform capable of supporting a rapidly expanding customer population. Apply today to become part of the Leidos team that is assisting CESO as they migrate to a high security cloud environment by providing network and communication services, monitoring services, and system administration. This position is based in Arlington, VA and is 100% on-site. 2nd Shift hours are Monday-Friday, 12pm-8pm. Primary Responsibilities Create, maintain, and implement detailed documentation for standard systems operating procedures to be used across the enterprise. Develop, implement, and monitor policies and standards for allocation related to the use of computing resources. Analyze available hardware and software from outside vendors and make recommendation for purchase and installation of cost-effective solutions. Review work performed by lower-level technical staff. Work both independently as well as in coordination with network administrators to maintain the smooth operation of a multi-user computer system. Basic Qualifications Bachelor's degree and 4+ years of overall related experience with a Windows servers environment (e.g. 2008r2 and 2012r2). Additional experience, education and training may be considered in lieu of degree. An active TS/SCI security clearance is required for this position. Currently possess DoD 8750 certification at least IAT level II, e.g Security+ce. Candidate may be asked to obtain CI Poly in future Experience with configuration, troubleshooting and maintaining VMware environments. Experience with Remote Desktop Services Experience with PowerShell scripting and experience in other languages like Python. Experience with application of security settings and other commercial best practices such as DISA STIGS. Experience with Security Content Automation Protocol (SCAP) Experience with Group Policy Management (GPO) and applying Local Security Policies Experience with Windows Task Scheduler Experience Managing Active Directory Experience with System (hardware) and application (software) installation and configuration. Application of security settings and other commercial best practices such as DISA STIGS. Preferred Qualifications Prior experienced with DISA and DISA’s support to mission partners TS/SCI w/CI Poly Preferred Integration of Network Management (NM) and Element Management (EM) systems with network performance, trouble ticketing, and security subsystems highly desired. Experience with support systems to include enclave Ethernet switches, storage area networks (SAN), and network attached storage (NAS). Candidates with a thorough knowledge of networking principles to included TCP/IP a plus. Experience with a ticketing system such as BMC Remedy. ITIL v3 Foundation certified Linux OS experience. Solaris OS experience. Experience working with virtual environments. Why Leidos? At Leidos, we are dedicated to making the world safer, healthier, and more efficient through technology, engineering, and science. You would be a valued member of global team providing services across civil, defense, health and intelligence business lines. At Leidos, team member career development, flexibility, and well-being are priority and is supported by consistent leadership engagement, an experienced human relations staff, and numerous employee development and enrichment programs. Use your unique talents and make an immediate impact! Apply today! If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares. Original Posting: July 17, 2026 For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above. Pay Range: Pay Range $73,450.00 - $132,775.00 The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.