Senior Software Systems Engineer - Level 3

Overview 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 re‑imagining how space can connect us, ensuring security and prosperity. Responsibilities The Software Systems Engineer will use Model‑Based Systems Engineering (MBSE) methodologies to define, design, and maintain complex system architectures using Cameo Systems Modeler (MagicDraw) and decompose software requirements from systems and component requirements. This role bridges the gap between high‑level system requirements and detailed software development, ensuring traceability and consistency across the lifecycle. Basic Qualifications Experience in systems engineering, software engineering, or related field. Proven expertise in Cameo Systems Modeler / Cameo Enterprise Architecture or equivalent. Knowledge of SysML (System Modeling Language) and/or UML (Unified Modeling Language). US Citizenship required. Final secret clearance needed to start. Desired Skills INCOSE Certified Systems Engineering Professional (CSEP) or OMG Certified Systems Modeling Professional (OCSMP). Demonstrated ability to author clear, concise, and traceable software requirements—including functional, non‑functional, and interface specifications—that align with stakeholder needs and project goals. Experience with DOORS a plus. Experience in Agile development, Configuration Management, DO‑178C. Experience in aerospace, defense, or complex electronics. Experience with DOD Software CDRL Development. Ability to thrive in a fast‑paced, synergetic team environment. Demonstrated behaviors of a systems thinker with the ability to select and apply appropriate systems thinking skills to solve problems and implement constructive change. Excellent written and verbal communication skills, strong social skills, and ability to build consensus among peers while building solid relationships with team members. Security Clearance Active secret security clearance. Equal Opportunity Lockheed Martin is an equal opportunity employer. Qualified candidates will be considered without regard to legally protected characteristics. Additional Information Experience Level: Experienced Professional Business Unit: SPACE Type: Full‑Time Shift: First Clearance Level: Secret #J-18808-Ljbffr Lockheed Martin