> Markdown version of [/jobs/ext/3894207-systems-engineer-sr-level-3](https://www.wearedevelopers.com/jobs/ext/3894207-systems-engineer-sr-level-3). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Systems Engineer Sr - Level 3 - **Company:** Lockheed Martin - **Location:** Marietta, GA, United States - **Experience:** Expert - **Salary:** $85,300.0 - $158,300.0 - **Contract:** Permanent contract - **Skills:** Agile Methodology, Systems Engineering, Linux System Administration, Requirements Management, Software Engineering, Software Requirements Analysis, System Testing, Systems Integration, Digital Twin, Devsecops - **Published:** October 23, 2026 - **Apply:** https://www.techcareers.com/job.asp?id=3466484614&tx=UT5854THV&pt=1&aff=0B19D771-A501-4A5E-8338-2A822B784D54&utm_source=Job%20Feed&utm_medium=textkernel&utm_campaign=DE&utm_term=0B19D771-A501-4A5E-8338-2A822B784D54 ## About the Role A systems engineer with technical experience in simulation, software development, and systems integration. You thrive in fast-paced environments, excel at stakeholder communication, and are driven to deliver high-impact solutions that advance pilot training and tactical development., MUST BE A U.S. CITIZEN - This position is located at a facility that requires special access. The selected candidate must possess an active Secret clearance to start., * Bachelor's degree in an Engineering discipline. * Experience with Agile development process and tools * Experience in System Engineering practices in performing system requirements development, system design development, system integration and/or verification on complex systems * Knowledge of aircraft avionics Desired Skills * Experience in one or more of the following: avionics sensors, such as radar, electronic warfare, CNI, or IR subsystems * Experience in software development * Working knowledge in using the DOORS requirements management tool * Experience in development and execution of System Test Procedures ## Description You will be a Systems Engineer Senior, for the F-22 Air Combat Simulation (ACS) Man in the Loop (MITL) development team which is responsible for defining requirements of new features into the simulation, sustaining the product, and rehosting the Operational Flight Program for Linux environments. The ACS serves as the Digital Twin for the F22 aircraft and supports pilot training, tactics development, and DT/OT testing including DevSecOps support in the Raptor Virtual Development Lab (RVDL). What You Will Be Doing As the Systems Engineer for either the F-22 legacy or F-22 In A Box (F-22IAB) high fidelity combat simulation you will be responsible for defining requirements and guiding the architecture and MITL software development team. What's In It For You We are committed to supporting your work-life balance and overall well-being, offering flexible scheduling options. Learn more about Lockheed Martin's comprehensive benefits package here. (https://lmt.co/OneLM-JobDescription-Benefits) Do you want to be part of a company culture that empowers employees to think big, lead with a growth mindset, and make the impossible a reality? We provide the resources and give you the flexibility to enable inspiration and focus - if you have the passion and courage to pursue ambitious goals, work hard, and enjoy what you do, we want to build a better tomorrow with you.