System Administrator
Listed on 2026-11-05
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IT/Tech
Systems Administrator, Cybersecurity, Systems Engineer
At Leidos
, we deliver innovative solutions through the efforts of our diverse and talented people who are dedicated to our customers' success. We empower our teams, contribute to our communities, and operate sustainable. Everything we do is built on a commitment to do the right thing for our customers, our people, and our community. Our Mission, Vision, and Values guide the way we do business.
you ready for your next career challenge?
Leidos is seeking a Senior Windows System Administrator (requires minimum Secret clearance and individual must qualify for TS SCI) to join our high-performing team in support of a complex, fast-paced program. In this role, the selected 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, as well as engineering assistance, deploying, and sustaining new capabilities within the environment.
You will be working a hybrid schedule - remote and occasionally at Robins AFB - and be part of our talented team at the forefront of technology. At Leidos, we offer 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.
Join us and make a difference in National Security!
Primary Responsibilities:
The selected candidate will be responsible for monitoring and administrating systems, applications, and processes to ensure issues are identified, tracked, and resolved in a timely manner.
This role also includes supporting servers, as well as performing security management and application performance optimization activities in an environment made up of window Hyper-Server hosts, Windows and Linux servers, and network devices.
Additional responsibilities include:- Serve as a senior technical SME responsible for designing, implementing, maintaining, and supporting enterprise IT infrastructure.
- Lead the installation, administration, and troubleshooting of Windows Server, Linux, Hyper-V clusters, virtual machines, and storage systems.
- Manage core enterprise services, including Active Directory, DNS, DHCP, Group Policy, NPS, and PKI.
- Oversee system monitoring, logging, patch management, backups, disaster recovery, and endpoint security.
- Lead complex troubleshooting efforts involving servers, virtualization, networking, authentication, and application performance.
- Manage vulnerability remediation, IAVAs, STIG compliance, security scanning, and patching in accordance with DoD requirements.
- Work with cybersecurity teams to implement security controls, address findings, and support RMF and ATO activities.
- Develop and maintain technical documentation, SOPs, system configurations, network diagrams, and recovery procedures.
- Lead system integration, testing, and deployment activities to meet operational and cybersecurity requirements.
- Mentor junior personnel, review configurations, and provide technical guidance.
- Collaborate with engineering, cybersecurity, networking, and program teams to resolve technical issues and meet project milestones.
- Identify and recommend improvements to system performance, reliability, security, and infrastructure efficiency.
- Monitor system health, manage outages, identify technical risks, and communicate status to program leadership.
- Support technical design reviews, trade studies, system testing, and configuration management activities.
- Ensure system changes follow approved change control, documentation, testing, and security review processes.
- Independently manage complex technical tasks, make informed decisions, and lead infrastructure efforts with minimal supervision.
Clearance Required:
Must be eligible for TS/SCI. Minimum Secret to start.
- Bachelor's degree in IT, Computer Science, Engineering, or a related field with 12+ years of relevant experience. Additional experience may substitute for a degree.
- 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,…
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