Senior Systems Integration and Test Engineer

Leidos is seeking a Systems Integration & Test Engineer to be based out of Gaithersburg, MD. This position will support the United Kingdom National Airspace System Replacement Product Delivery Team - UK NASR PDT. This effort delivers enhanced capabilities to replace and modernize the current operational system supporting UK air traffic services.

You will join a dynamic engineering team responsible for building and sustaining real-time, high-availability, safety-critical systems that directly support national airspace operations.

• Design, develop, and execute comprehensive integration and test plans, procedures, and cases to verify system functionality, performance, and requirements compliance
• Lead and coordinate formal test events including:
  • Factory Acceptance Testing (FAT)
  • Functional Testing
  • System & Integration Testing
  • User Acceptance Testing (UAT)
• Ensure traceability between requirements, verification activities, and test artifacts
• Develop and maintain automated test scripts using tools such as HP ALM, Selenium, or equivalent platforms
• Track and report test execution status, producing detailed reports and artifact packages for internal stakeholders and government customers
• Manage defects, change requests, and action items through resolution
• Facilitate test readiness reviews, peer reviews, and customer-facing test planning sessions
• Collaborate with software engineers, system engineers, and program leadership to ensure testability of requirements and alignment with project schedules
• Support development and maintenance of systems engineering documentation including:
  • Requirements Verification Matrices (RVM)
  • Interface documentation
  • Architectural artifacts
• Mentor junior engineers and promote best practices in integration and verification

• Bachelor’s degree in a related technical discipline with 8+ years of professional experience
  • OR Master’s degree with 6+ years of professional experience
• Ability to obtain an SF-85P Public Trust clearance from the FAA customer.
• Experience leading integration and test activities for complex software systems
• Experience working within a defined Integration & Test development lifecycle
  
  Strong hands‑on integration experience with large, distributed, or real‑time systems
• Experience working in UNIX and/or Linux environments
• Demonstrated ability to lead cross‑functional teams and coordinate formal test events
• Strong communication skills to interface effectively with internal teams and external government stakeholders

• Advanced integration experience in one or more of the following areas:
  • New system functionality integration
  • Regression testing
  • Problem determination and root cause analysis
  • Data reduction and analysis
  • PR verification and change validation
• Experience supporting formal government acceptance testing
• Familiarity with systems engineering practices including:
  • Requirements engineering
  • Requirements baseline control and management
  • Operational and decision analysis
  • System definition and architecture development
• Air Traffic domain knowledge or experience supporting air traffic programs
• Experience operating in fast‑paced, high‑accountability environments requiring independent execution

You will play a critical role in validating and integrating software that supports national airspace operations. This position requires precision, discipline, and leadership - ensuring complex systems perform reliably in operational environments where safety and performance are paramount.

Pay Range $ - $

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,…