# Senior Windows System Administrator **Company**: Leidos **Location**: Remote, US **Work arrangement**: hybrid **Experience**: senior **Job type**: full-time **Salary**: $116,350.00 - $210,325.00 **Category**: IT **Industry**: Technology **Apply**: https://leidos.wd5.myworkdayjobs.com/en-US/External/job/Remote-US/System-Administrator_R-00195844?utm_source=yubhub.co&utm_medium=jobs_feed&utm_campaign=apply **Canonical**: https://yubhub.co/jobs/job_a53bfcbb-afc ## Description Leidos is seeking a Senior Windows System Administrator to join its high-performing team in support of a complex, fast-paced program. The successful candidate will provide daily systems administration and operations and maintenance support across multiple systems with a broad geographic footprint. Key responsibilities include: - Supporting operational requirements and engineering assistance - Deploying and sustaining new capabilities within the environment - Monitoring and administering systems, applications, and processes to ensure issues are identified, tracked, and resolved in a timely manner - Supporting servers and performing security management and application performance optimization activities Additional responsibilities include: - Serving as a senior technical SME responsible for designing, implementing, maintaining, and supporting enterprise IT infrastructure - Leading the installation, administration, and troubleshooting of Windows Server, Linux, Hyper-V clusters, virtual machines, and storage systems - Managing core enterprise services, including Active Directory, DNS, DHCP, Group Policy, NPS, and PKI - Overseeing system monitoring, logging, patch management, backups, disaster recovery, and endpoint security - Leading complex troubleshooting efforts involving servers, virtualization, networking, authentication, and application performance - Managing vulnerability remediation, IAVAs, STIG compliance, security scanning, and patching in accordance with DoD requirements - Working with cybersecurity teams to implement security controls, address findings, and support RMF and ATO activities - Developing and maintaining technical documentation, SOPs, system configurations, network diagrams, and recovery procedures - Leading system integration, testing, and deployment activities to meet operational and cybersecurity requirements - Mentoring junior personnel, reviewing configurations, and providing technical guidance - Collaborating with engineering, cybersecurity, networking, and program teams to resolve technical issues and meet project milestones - Identifying and recommending improvements to system performance, reliability, security, and infrastructure efficiency - Monitoring system health, managing outages, identifying technical risks, and communicating status to program leadership - Supporting technical design reviews, trade studies, system testing, and configuration management activities - Ensuring system changes follow approved change control, documentation, testing, and security review processes - Independently managing complex technical tasks, making informed decisions, and leading infrastructure efforts with minimal supervision Leidos offers competitive benefits, including Paid Time Off, 11 paid Holidays, 401K with a 6% company match and immediate vesting, Flexible Schedules, Discounted Stock Purchase Plans, Technical Upskilling, Education and Training Support, Parental Paid Leave, and much more. **Requirements:** - Bachelor's degree in IT, Computer Science, Engineering, or a related field with 12+ years of relevant experience - Minimum of 7 years of Windows systems administration experience, including 3 years in a senior or technical lead role - Minimum of 5 years of experience with Active Directory, DNS, Group Policy, and core Windows enterprise services - Active Top Secret/SCI security clearance or current Secret security clearance with the ability to obtain a TS/SCI security clearance within 365 days from hire date - Strong experience with Microsoft Hyper-V, virtual machines, clustering, storage, and Windows Server 2022/2025 - Working knowledge of networking, including TCP/IP, VLANs, routing, and firewalls - Experience with PowerShell scripting, automation, and Windows command-line tools - Experience supporting monitoring, logging, patch management, backup, and disaster recovery solutions - Hands-on experience with vulnerability scanning, IAVA remediation, STIG compliance, and system hardening - Working knowledge of DoD cybersecurity requirements, including NIST SP 800-53, RMF, and security configuration standards - Ability to troubleshoot complex infrastructure issues, support system integration, and maintain technical documentation and SOPs - Demonstrated ability to lead technical efforts, mentor junior administrators, work across engineering teams, and independently resolve technical challenges - Experience following configuration management, change control, and system maintenance processes - Strong communication, organizational, and problem-solving skills - Must meet applicable DoD 8140 certification and qualification requirements for the assigned work role ## Skills ### Required - Windows Server - Active Directory - DNS - Group Policy - Microsoft Hyper-V - PowerShell scripting - networking - TCP/IP - VLANs - routing - firewalls - monitoring - logging - patch management - backup - disaster recovery - vulnerability scanning - IAVA remediation - STIG compliance - system hardening - DoD cybersecurity requirements - NIST SP 800-53 - RMF - security configuration standards ### Nice to have - Experience supporting DoD integration and testing environments - Active Top Secret/SCI security clearance - Hands-on experience with Windows Server 2025 - Hyper-V high-availability clustering - enterprise storage solutions - data center installations - Cisco networking - secure remote access - Factory Acceptance Testing (FAT) - System Acceptance Testing (SAT) - technical design reviews --- Source: [Apply at leidos.wd5.myworkdayjobs.com](https://leidos.wd5.myworkdayjobs.com/en-US/External/job/Remote-US/System-Administrator_R-00195844?utm_source=yubhub.co&utm_medium=jobs_feed&utm_campaign=apply)