Senior Systems Engineer (SE-3)

Leidos has a new and exciting opportunity for a Senior Systems Engineer in our Intel Sector.  Our talented team is at the forefront in Security Engineering, Computer Network Operations (CNO), Mission Software, Analytical Methods and Modeling, Signals Intelligence (SIGINT), and Cryptographic Key Management. 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!  

Job Summary:

Our LOE program provides our customer's Operations organization with the best possible solutions for their mission needs. We achieve this through rapid prototyping, new development, and advanced technology research. From leading-edge visualizations to analytic development, we're always pushing the boundaries to find new and better data sources and tradecraft to answer intelligence questions. With a focus on collaboration and a fast-paced environment, our prototype development program is the ideal place to grow your skills and make a real impact. Click here to learn more about how this program “Delivers Mission Success!”

Seeking a motivated Senior Systems Engineer to support the exciting Analysis & Mitigations mission to assist in defining and implementing a system architecture for an Agentic Knowledge Management System using an agentic framework to perform automated knowledge extraction.  The engineer will work closely with the project lead to manage system integration, develop and maintain deployment strategies and processes, ensure compliance, perform system testing, validation, and life cycle sustainment.  Additionally, participate in the development and maintenance of technical plans, milestones, and code reviews.

*Qualified candidates are eligible for enhanced incentives including up to a $25K cash sign on bonus or a paid time off bonus.

Job Responsibilities/Qualifications:

• Mission Focus: Collaborate closely with project leadership to manage system integration, develop and maintain deployment strategies and processes to ensure smooth delivery of product.  Coordinate efforts across the team for effective collaboration and project delivery.  Ensure compliance with system standards and best practices through system testing, validation, and life cycle sustainment. Develop and maintain technical plans, milestones, and code reviews.
• Technical Proficiency: Coordinate with relevant stakeholders to ensure seamless component integration. Decompose project requirements into actionable technical tasks and specifications for software engineers, data scientists, and UX designers. Maintain comprehensive documentation of system architecture, integration, and deployment. Implement and enforce system standards, protocols, and best practices. Conduct regular security, performance, and quality audits for compliance.
• Qualifications: Bachelor's degree plus nine (9) years of relevant experience as a systems engineer or equivalent. Understanding of Agile and other constructs, and CI/CD practices.
• Security Clearance: Active TS/SCI with Polygraph required to be considered for this role.
• Desirable Skills: Knowledge of Agentic frameworks (langgraph) and customer dataflows and sources.

At Leidos, the opportunities are boundless. We challenge our staff with interesting assignments that allow them to thrive professionally and personally. For us, helping you grow your career is good business. We look forward to learning more about you – apply today!

Careers.leidos.com

CONMD

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:

July 13, 2026

Pay Range:

Pay Range $107,900.00 - $195,050.00

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.