Senior Systems Administrator

Leidos LLC; Piketon (OH); On-site; USD 73,000 - 133,000; Full time

Benefits offered by this job

Health and Wellness programs

Income Protection

Paid Leave and Retirement

Job summary

Leidos LLC in Piketon, Ohio, seeks a Senior Systems Administrator to work independently providing systems administration for the DOE Portsmouth site, with responsibility for design, deployment, maintenance, configuration management, monitoring and troubleshooting of the IT infrastructure.

The role requires a Bachelor's (4-8 years) or Master's (2-6 years) in CS/IT, DOE Q security clearance eligibility, and hands-on experience with Windows, Linux, VMware, Active Directory, and networked

Qualifications

• Bachelor’s degree with 4–8 years of relevant experience or Master’s degree with 2–6 years of experience.
• Ability to obtain and maintain a DOE Q security clearance.
• Demonstrated ability to work independently with minimal supervision in a fast-paced environment.

Responsibilities

• Perform daily system administration, operation and maintenance in a physical and virtual environment.
• Manage IT server infrastructure and hosted systems including AD, permissions, storage, and Group Policy.
• Support troubleshooting for software, databases and system access; resolve hardware and software issues.

Skills

Active Directory

Windows Server

VMware

Linux (RHEL)

Security clearance

Documentation

Problem solving

Education

Bachelor's degree in Computer Science/IT

Master's degree in Computer Science/IT

Tools

VMware platforms

Oracle

RHEL/Linux

Job description

Leidos has an exciting and rewarding opportunity for a Senior Systems Administrator to work independently with minimal supervision providing systems administration for the Infrastructure and Deactivation & Remediation contractors at the DOE Portsmouth (Piketon, Ohio) site. The position will be part of an IT team responsible for the design, deployment, maintenance, configuration management, monitoring and troubleshooting of the IT infrastructure.

Primary Responsibilities

• Perform daily system administration, operation and maintenance support activities in support of a physical and virtual environment.
• Provide primary support and management of the IT server infrastructure and hosted systems, focusing on areas like Active Directory, permissions, storage, Group Policy, etc.
• Support first-tier technical staff with troubleshooting and the resolution of more complex issues related to software tools, applications, databases, and system access.
• Analyze and resolve hardware and software problems for end users, with primary emphasis on server-related issues.
• Support System Administration of primary Omnissa/VMWare platforms across the site, among other technologies
• Works with hardware/software vendors to analyze, troubleshoot and resolve issues.
• Recommend hardware and software solutions to meet end user and IT needs.
• Support Cyber Security compliance and audit preparation in coordination with the Cyber Security Team.
• Consults with internal departments to identify customer needs and include into both operational and project objectives.
• Remain conversant with the industry’s computer security technology and practices with technical skills and applicable experience with related technologies.
• Define and document best practices, technical guides and support procedures
• Interact with cross functional project teams including Software Development, Helpdesk, User Support, Cyber Security, Software Quality Assurance, End-Users and Oversight.
• Participate in the creation and ongoing maintenance of documentation to ensure clear, concise and accurate information is readily available to assist with incident resolution
• Remediate security vulnerabilities
• Communicates effectively via Microsoft Teams, email and phone.

Basic Qualifications

• Bachelor’s degree in Computer Science, Information Technology, or related field with 4-8 years of relevant experience; OR a Master’s degree with 2-6 years of experience.
• Ability to obtain and maintain a DOE Q security clearance.
• Demonstrated ability to work independently with minimal supervision in a fast-paced environment with competing priorities.
• Exceptional analytical, technical, and problem-solving skills with proven success in enterprise systems administration.
• Strong verbal and written communication skills, with the ability to articulate complex technical concepts to diverse audiences.
• Experience with Microsoft Windows and Server Operating Systems and/or Oracle, RHEL, and Linux Operating Systems.
• Hands-on experience in maintenance, operation, and troubleshooting of enterprise systems and networks.
• Solid operational knowledge of Microsoft and/or Linux platforms, as well as network equipment, topology, and architectures.
• Ability to read and execute complex software installation, upgrade, and infrastructure deployment instructions.
• Strong interpersonal skills and demonstrated ability to collaborate effectively across teams.

Preferred Qualifications

• Prior DOE site experience.
• Active DOE security clearance.
• Industry-recognized certifications such as MCP, MCSE, CCNA, CCNP, Network+, VMware VCP, or related credentials.
• Experience administering and managing shared enterprise resources.

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: October 7, 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.

Pay and Benefits

Pay and benefits are fundamental to any career decision. That’s why we craft compensation packages that reflect the importance of the work we do for our customers.

• competitive compensation
• Health and Wellness programs
• Income Protection
• Paid Leave and Retirement

More details are available here.

Securing Your Data

Leidos will never ask you to provide payment-related information at any part of the employment application process. And Leidos will communicate with you only through emails that are sent from a Leidos.com email address. If you receive an email purporting to be from Leidos that asks for payment-related information or any other personal information, please report the email to [e-mail].

Commitment and Diversity

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.

Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $17.2 billion for the fiscal year ended January 2, 2026. For more information, visit www.Leidos.com.