Leidos is seeking a talented Software Test Engineer to work in our Huntsville office. This is an exciting opportunity to use your experience to help test software for Tactical strike guided munition programs. This position focuses on automated testing, development of robust, innovative software test infrastructures and frameworks, integration testing, informal manual testing, formal software qualification testing, fielding and support, and maintenance of software products. Software products range from analysis tools/simulations, mission planning software, and components of mission-critical systems. Primary Responsibilities • Involves direct participation as an integral team member who performs key roles with respect to test planning, test strategy and design, test execution, software engineering processes, and recommendations on product quality. • Involves reviewing, editing, and generating various documents used for engineering and testing purposes per industry standards. • Involves learning from more senior test engineers. • Involves communication with software developers and other team members on a frequent basis. Basic Qualifications • Candidate must possess at least a bachelor’s degree in Software Engineering, Computer Science, Computer Engineering, Electrical Engineering, Aerospace Engineering, Mathematics, or equivalent technical degree with an overall GPA of 3.0 or higher. • Candidate should have 2+ years of relevant technical experience with BS degree. • Active Secret clearance or ability to obtain and maintain one. • Proven experience performing software test on complex, multi-disciplinary projects. • Have experience implementing with software test automation. • Candidate must demonstrate ability in software development in either C#/.NET, C, C++, Java, Python, or Ruby programming languages. • Great communication skills with ability to present to senior leadership and government customers. Preferred Qualifications • Experience writing user interface (UI) tests with automated UI testing technologies. • Experience with applicable industry standards (IEEE 12207, CMMI, DO-178C and/or DO-278, MIL-STD-882e, RMF). • The ability to work across multiple products under development by multiple small teams. • Knowledge of Modular Open Systems Approach (MOSA) principles and application • Experience with containerization, CI/CD pipelines, and microservices technology. • Experience testing guidance & control algorithms, navigation systems, mission planning systems (NOMS, JMPS), and sensors a huge plus. • Familiarity with Model-Based Systems Engineering (MBSE) and SysML. • Understanding of hardware-software integration and software systems engineering principles Original Posting: August 7, 2026 Pay Range: Pay Range $69,550.00 - $125,725.00 The Leidos pay range for this job level is a general guideline onlyand 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.