Senior System Domain Administrator

As a Senior System Domain Administrator, you will support efforts to redesign the AD structure to facilitate an agency re-organization and IT Modernization project. You will be regarded as a senior resource in this position and you will have responsibility assisting other domain administrators for the implementation of a schema to reconfigure and establish security groups, permissions, and other aspects to support the Agency re-organization. To be successful in this role, you should have direct experience supporting Active Directory (AD) engineering and operations.

What will you do in this role?

• Analyze the existing environment, to include Organization Units (OU), GPOs, Domain Name Service (DNS) and Security Groups and designs an appropriate structure and naming convention that follows industry standards and best practices.
• Conduct interviews with stakeholders to identify organization and mission requirements as they relate the capabilities of the AD infrastructure: resiliency, survivability, permission delegation, operational management.
• Create documentation on the new domain structure, migration plan and timeline.
• Clean up the existing environment to eliminate artifacts; prepares and builds the new environment based on the redesign plan.
• Implement user rights assignments for specific systems in accordance with industry best practices.
• Configure security policies, including password policies, account policies and audit policies in accordance with DoD guidelines.
• Conduct testing to validate resources migrated successfully and provide training as required.
• Create and maintain system documentation for domain technologies, including installation, configuration, and appropriate troubleshooting steps.
  
  

These are the required qualifications:

• Bachelor's Degree and 12 years, Master's Degree and 10 years or equivalent work experience may be considered in lieu of degree.
• Must have IATIII 8570 Certification
• Experience with Active Directory services infrastructure architect/design/support.
• Proven experience architecting and designing AD forests, domain, trusts, DNS, DHCP, GPOs and OUs.
• Experience with planning and performing Active Directory migrations
• Experience with scripting (PowerShell).
• Knowledge of security policies and general vulnerabilities management.
• Understanding of network topologies, both transport and IP.
• Active and current Secret security clearance with ability to obtain Top Secret/SCI clearance.
  
  

These are the preferred qualifications:

• Bachelor's degree in associated field
• Excellent project, technical, interpersonal, presentation and problem management skills
• Familiarity with DOD regulations and directives.
  
  

Come break things (in a good way). Then build them smarter.

We're the tech company everyone calls when things get weird. We don't wear capes (they're a safety hazard), but we do solve high-stakes problems with code, caffeine, and a healthy disregard for "how it's always been done."

Original Posting:

October 1, 2025

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 $112,450.00 - $203,275.00

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.