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Senior Software Systems Engineer - Level 3 Security Clearance
Job in
King of Prussia, Montgomery County, Pennsylvania, 19406, USA
Listed on 2026-02-21
Listing for:
Lockheed Martin
Full Time
position Listed on 2026-02-21
Job specializations:
-
IT/Tech
Systems Engineer, Cybersecurity
Job Description & How to Apply Below
Job Number 718183
Description:
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. Join us in shaping a new era in space and find a career that's built for you.
The Software Systems Engineer will use Model-Based Systems Engineering (MBSE) methodologies to define, design, and maintain complex system architectures using Cameo Systems Modeler (Magic Draw). This role bridges the gap between high-level system requirements and detailed software development, ensuring traceability and consistency across the lifecycle.
Key Responsibilities
• Model Development:
Create, maintain, and update SysML and UML models (Structure, Behavior, and Requirements) in Cameo Systems Modeler.
• Requirements & Traceability:
Derive, define, and manage software requirements and use cases, ensuring end-to-end traceability from systems architecture to software code. (DOORS Experience a plus).
•
Collaboration:
Work within a multidisciplinary team to define interdependencies and interfaces.
Basic Qualifications:
• Experience in systems engineering, software engineering, or related field.
• Proven expertise in Cameo Systems Modeler / Cameo Enterprise Architecture or equivalent.
• Deep knowledge of SysML (System Modeling Language) and/or UML (Unified Modeling Language)
• Ability to obtain secret security clearance
Desired
Skills:
• INCOSE Certified Systems Engineering Professional (CSEP) or OMG Certified Systems Modeling Professional (OCSMP).
• Experience in Agile development, Configuration Management, DO-178C.
• Experience in aerospace, defense, or complex electronics.
• Clearance:
Active secret security clearance
• Experience 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 Statement:
This position requires a government security clearance, you must be a US Citizen for consideration.
Clearance Level: Secret
Other Important Information You Should Know
Expression 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 off
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…
Position Requirements
10+ Years
work experience
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