Software Systems Testing Engineer

Reference: 733072BRPosted: 2026-06-23Location: Littleton, ColoradoSalary: $76,500 - $134,895Clearance: Top SecretCompany: Lockheed MartinDescription:Space is a critical domain, connecting our technologies, our security and our humanity. While others view space as a destination, we see it as a realm of possibilities, where we can do more — we can innovate, invest, inspire and integrate our capabilities to transform the future.    At Lockheed Martin Space, we aim to harness the full potential of space to cultivate innovation, reduce costs, and push the boundaries of what technology can achieve. We’re creating future-ready solutions, focusing on resiliency and urgency through our 21st Century Security vision. We’re erasing boundaries and forming partnerships across industries and around the world. We’re advancing spacecraft and the workforce to fuel the next generation. And we’re reimagining how space can connect us, ensuring security and prosperity.   Join us in shaping a new era in space and find a career that's built for you.   Space Protection Programs (SPP) is seeking a Software Systems Test Engineer to join our flight software qualification efforts. In this role, you will bridge the gap between software development and full-system mission readiness. You will collaborate across software teams to define comprehensive test cases, manage requirement verification matrices, and execute rigorous qualification testing. Your work will directly ensure the safety, reliability, and mission success of our flight vehicles. The selected candidate will assist development efforts spanning the full software lifecycle including architecture, design, implementation, integration, verification, and system bring-up. This individual is expected to operate with a high degree of technical ownership and execution leadership, guiding teams through complex software and hardware integration challenges while supporting Agile program execution.  This position requires technical understanding in embedded software verification and validation, system integration, and software qualification, as well as the ability to communicate effectively across multidisciplinary engineering teams and program stakeholders.  The ideal candidate is comfortable operating in dynamic mission environments, balancing technical execution, integration priorities, and evolving program needs while mentoring less experienced engineers and driving execution toward delivery milestones.  In this role you will:   - Collaborate Across Teams: Partner with software developers and systems engineers to define, document, and review comprehensive system test cases. - Verify Requirements: Trace, manage, and execute the verification and validation (V&V) matrix to map flight software requirements directly to test procedures. - Qualify Flight Software: Design, build, and execute automated qualification test suites on Hardware-in-the-Loop (HIL) simulators and flight-like hardware. - Leverage Test Frameworks: Write, maintain, and upgrade scalable automated test scripts using Python or other scripting tools. - Isolate & Debug Defects: Identify, reproduce, and log complex system-level bugs, working closely with developers to pinpoint root causes. - Analyze Telemetry Data: Review system logs and real-time telemetry stream data to verify vehicle performance during test flights and simulations. - Contribute to CI/CD Pipelines: Integrate automated test suites into continuous integration pipelines to catch regression bugs early in the build cycle. - Contribute to Compliance Documentation: Generate formal test plans, verification reports, and safety-critical compliance artifacts required for final flight readiness reviews. Applicants selected will be subject to a government security investigation and must meet eligibility requirements for access to classified information.Basic Qualifications:- Professional experience in software testing, systems integration, or software development - Proficiency in writing and maintaining automation scripts using Python or C++- Hands-on experience creating test plans, defining test cases, and developing testing matrices from engineering requirements - Comfortable operating within Agile Scrum development environments  Active Secret Security ClearanceDesired Skills:- Experience with software integration, debugging, and troubleshooting across hardware/software interfaces  - Knowledge of embedded systems architectures and experience testing and integrating embedded systems  - Hands-on experience configuring and operating HIL test benches (e.g., SPACE, National Instruments, Speedgoat). - Demonstrated experience using Agile methodologies in the development, integration, and test of complex software systems  - Proficiency using hardware diagnostic tools such as oscilloscopes, digital multimeters, logic analyzers, and protocol analyzers - Experience utilizing environmental or vehicle physics simulators (e.g., MATLAB, Simulink, STK) to feed mock data into software. - Experience with process improvement initiatives and execution optimization  - Experience supporting programs across the full lifecycle from concept development through operations and sustainment  - Comfortable working in fast-paced, dynamic, and highly collaborative technical environments  - Excellent written and verbal communication skills with the ability to influence technical direction and build consensus across engineering teams- Active Top Secret Security ClearanceSecurity Clearance Statement: This position requires a government security clearance, you must be a US Citizen for consideration.Clearance Level: Top SecretOther Important Information You Should KnowExpression of Interest: By applying to this job, you are expressing interest in this position and could be considered for other career opportunities where similar skills and requirements have been identified as a match. Should this match be identified you may be contacted for this and future openings.Ability to Work Remotely: Onsite Full-time: The work associated with this position will be performed onsite at a designated Lockheed Martin facility.Work Schedules: Lockheed Martin supports a variety of alternate work schedules that provide additional flexibility to our employees. Schedules range from standard 40 hours over a five day work week while others may be condensed. These condensed schedules provide employees with additional time away from the office and are in addition to our Paid Time off benefits.Schedule for this Position: 9x80 every other Friday offPay Rate: The annual base salary range for this position in California, Massachusetts, and New York (excluding most major metropolitan areas), Colorado, Hawaii, Illinois, Maryland, Minnesota, New Jersey, Vermont, Washington or Washington DC is $76,500 - $134,895. For states not referenced above, the salary range for this position will reflect the candidate’s final work location. Please note that the salary information is a general guideline only. Lockheed Martin considers factors such as (but not limited to) scope and responsibilities of the position, candidate's work experience, education/ training, key skills as well as market and business considerations when extending an offer.Benefits offered: Medical, Dental, Vision, Life Insurance, Short-Term Disability, Long-Term Disability, 401(k) match, Flexible Spending Accounts, EAP, Education Assistance, Parental Leave, Paid time off, and Holidays. (Washington state applicants only) Non-represented full-time employees: accrue at least 10 hours per month of Paid Time Off (PTO) to be used for incidental absences and other reasons; receive at least 90 hours for holidays. Represented full time employees accrue 6.67 hours of Vacation per month; accrue up to 52 hours of sick leave annually; receive at least 96 hours for holidays. PTO, Vacation, sick leave, and holiday hours are prorated based on start date during the calendar year.This position is incentive plan eligible.Lockheed Martin is an equal opportunity employer. Qualified candidates will be considered without regard to legally protected characteristics.The application window will close in 90 days; applicants are encouraged to apply within 5 - 30 days of the requisition posting date in order to receive optimal consideration.At Lockheed Martin, we use our passion for purposeful innovation to help keep people safe and solve the world's most complex challenges. Our people are some of the greatest minds in the industry and truly make Lockheed Martin a great place to work. With our employees as our priority, we provide diverse career opportunities designed to propel, develop, and boost agility. Our flexible schedules, competitive pay, and comprehensive benefits enable our employees to live a healthy, fulfilling life at and outside of work. We place an emphasis on empowering our employees by fostering an inclusive environment built upon integrity and corporate responsibility.If this sounds like a culture you connect with, you’re invited to apply for this role. Or, if you are unsure whether your experience aligns with the requirements of this position, we encourage you to search on Lockheed Martin Jobs, and apply for roles that align with your qualifications.Experience Level: Experienced ProfessionalBusiness Unit: SPACERelocation Available: YesCareer Area: Software EngineeringType: Full-TimeShift: First