Principal Solutions Architect

Leidos is seeking an experienced Principal Solutions Architect to join our Integrated Information Technology Support Services (I3TS) team, who will support an extensive digital modernization program critical to Defense Threat Reduction Agency (DTRA) in Fort Belvoir, VA. The System Architect will work closely with the Leidos and Government technical leadership team to help drive innovation, growth, and efficiencies within the I3TS portfolio.

Clearance: Must have a TS/SCI Clearance at time of consideration. U. S. Citizen a must.

Primary Responsibilities:

• Support the I3TS Principal Solutions Architect in identifying service gaps and areas for improvement and driving continual innovation to evolve DTRA’s IT Infrastructure to meet current and future requirements
• Identify and explore opportunities for improving the following areas within I3TS, then leading the analysis of alternatives and proof of concept development that leads to the establishment of dedicated projects to implement the targeted and approved improvements:
  • Improving the performance of site surveys and migrations such that they are standardized, repeatable, automated, flexible, and efficient
  • Improving the use of automation to minimize staffing requirements, reduce the risk of human error, and enable staff to focus on more complex activities
  • Establishing open design principles to provide solutions that operate in a compatible, non-vendor lock-in environment with minimal custom configuration
  • Incorporate emerging technologies that enhance cybersecurity, drive down total cost, and enhance the end-user experience
• Work closely with project teams to ensure that the execution, aimed at implementing the targeted and approved improvements, remains aligned to the vision and intent of the improvements
• Collaborate with Leidos Team and Government stakeholders to identify potential areas for improvement
• Conduct an initial feasibility assessment of candidate initiatives, followed by a more detailed analysis of alternatives
• Document and present the results of the analysis to Leidos and Government stakeholders through the engineering review boards
• Oversee the development of proofs of concept, which are narrowly scoped projects (3 months or less) to provide demonstrable and measurable insights into the utility of the candidate improvement(s)
• Draft a detailed project plan outlining the technical approach as well as the cost, schedule, and risks to thoroughly implement the improvement.

Basic Qualifications:

• Bachelor's degree or higher in Computer Science, Information Technology, Engineering, Engineering Management, Management Information Systems, or related STEM degree program, and 8 - 10 years of relevant experience.
• Ability to obtain and maintain DoW TS/SCI clearance
• Experience designing solutions for secure, scalable, and robust on premise and cloud-based virtualized infrastructures.
• Experience planning and executing the migration of applications and services.
• Experience developing and maintaining architecture artifacts, and effectively communicating the Design to executive and technical stakeholders
• Experience evaluating and recommending new technologies, tools, and frameworks to improve performance, scalability, security, and costs
• Experience operating in a DevSecOps environment of comparable size and complexity
• Proven written and oral communications skills targeted at all levels of an organization
• Possess an active TS/SCI Clearance
• Successful verification of your 8140 (Previously 8570), IAT Level II (SEC+ or equivalent) prior to your start date with Leidos, as well as ability to maintain certification for duration of assignment to the DTRA I3TS contract.

Preferred Qualifications:

• Experience Designing, deploying, and maintaining IT infrastructures for DTRA or other DoW organizations

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

September 3, 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 $131,300.00 - $237,350.00

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.

About Leidos

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 $16.7 billion for the fiscal year ended January 3, 2025. For more information, visit

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. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available at

Commitment to Non-Discrimination

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.