Systems Integration and Test Engineer

Leidos•Gaithersburg, MD

1d•Hybrid

About The Position

Systems Integration & Test Engineer UK NASR PDT Evolution Program 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. This is a U.S.-based position that offers a balanced hybrid schedule between 2-3 days in the office per week. What You’ll Do 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 Required Qualifications Bachelor’s degree in a related technical discipline with 4+ years of professional experience, OR Master’s degree with 2+ years of professional experience Ability to obtain and maintain a Public Trust clearance 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 US citizenship required Desired Qualifications 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 Why Leidos 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. If you are motivated by solving complex integration challenges and leading formal verification efforts in regulated, mission-critical systems, we encourage you to apply. 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: February 19, 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 $87,100.00 - $157,450.00 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. Leidos Leidos is a Fortune 500® innovation company rapidly addressing the world's most vexing challenges in national security and health. The company's global workforce of 47,000 collaborates to create smarter technology solutions for customers in heavily regulated industries. Headquartered in Reston, Virginia, Leidos reported annual revenue of approximately $15.4 billion for the fiscal year ended December 29, 2023. For more information visit www.Leidos.com. 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 here. Securing Your Data Leidos will never ask you to provide payment-related information at any part of the employment application process. And Leidos will communicate with you only through emails that are sent from a Leidos.com email address. If you receive an email purporting to be from Leidos that asks for payment-related information or any other personal information, please report the email to [email protected]. Commitment and Diversity 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.

Requirements

Bachelor’s degree in a related technical discipline with 4+ years of professional experience, OR Master’s degree with 2+ years of professional experience
Ability to obtain and maintain a Public Trust clearance
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
US citizenship required

Nice To Haves

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

Responsibilities

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