Senior Windows Systems Administrator - Security Remediation

Leidos; Chantilly (VA); On-site; USD 116,000 - 210,000; Full time

Benefits offered by this job

Health and Wellness programs

Income Protection

Paid Leave

Retirement

Job summary

Leidos Intelligence Group in Chantilly, Virginia seeks a Senior Systems Administrator to lead remediation, system hardening, and Active Directory governance across a Windows-heavy enterprise.

You will partner with INFOSEC and client/server teams to implement patches, configure secure baselines, and report remediation progress, ensuring alignment with ATO requirements and security controls.

A Top Secret/SCI w/Poly clearance is required for consideration.

Qualifications

• Clearance: Top Secret/SCI w/Poly required for consideration.
• Bachelor’s degree with 12+ years or Master’s with 10+ years of relevant experience; or 16 years of experience in lieu of degree.
• Experience with Client/Server architectures and both Linux and Windows environments.
• Must pass customer-required and administered medical and psychological screening.

Responsibilities

• Lead vulnerability remediation across Windows systems; assess impacts before changes.
• Perform system hardening and configuration changes per baselines and STIGs.
• Design, implement, and manage Group Policy Objects (GPOs) and AD security settings.
• Support ATO and accreditation efforts through evidence, documentation, and reporting.
• Collaborate with INFOSEC and Client/Server teams to coordinate remediation activities.

Skills

Client/Server experience

Linux

Windows

Top Secret/SCI w/Poly clearance

Education

Bachelor's degree

Master's degree

Job description

Leidos Intelligence Group in Chantilly, Virginia seeks a Senior Systems Administrator to lead remediation, system hardening, and Active Directory governance across a Windows-heavy enterprise.

You will partner with INFOSEC and client/server teams to implement patches, configure secure baselines, and report remediation progress, ensuring alignment with ATO requirements and security controls.

A Top Secret/SCI w/Poly clearance is required for consideration.