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Senior Software Engineer, Systems - Level 3 Security Clearance
Job in
King of Prussia, Montgomery County, Pennsylvania, 19406, USA
Listed on 2026-01-24
Listing for:
Lockheed Martin
Full Time
position Listed on 2026-01-24
Job specializations:
-
Engineering
Systems Engineer, Software Engineer, Cybersecurity
Job Description & How to Apply Below
Job Number 714777
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 MK21A program is seeking a dynamic and experienced software engineer to support their development teams. Perspective candidates will:
The MK21 program seeks a motivated, detail focused Software Systems Engineer who will integrate system and software designs into a unified product, maintain end to end traceability, and contribute to test equipment development.
Key Responsibilities
• Translate system architecture, customer/product requirements, and CONOPS into detailed software requirements and interface definitions.
• Support verification planning by establishing clear traceability links from architecture through requirements to test artifacts.
• Leverage cutting edge Model Based Systems Engineering (MBSE) tools and processes (e.g., SysML, Magic Draw, Cameo) to create synergistic models that connect verification items, requirements, and design elements.
• Develop and maintain product and process documentation (CDRLs - Contract Data Requirements List) in accordance with contract requirements.
• Coordinate design information across the system to ensure consistency and completeness throughout the development lifecycle.
• Use your excellent communication skills to work across the Lockheed Martin organization and customer/user community to ensure consensus and understanding of solutions You have opportunities to play an active role in strengthening the quality of life where we live and work by volunteering more than 850,000 hours annually. Here are some of the benefits you can enjoy:
• Medical
• Dental
• 401k
• Paid time off
• Work/life balance
• Career development
• Mentorship opportunities
• Rewards & recognition
Basic Qualifications:
• Experience in one or more Software Systems
Engineering functions, such as:
• Subsystem design or analysis
• Systems or software modeling experience
• Requirements and Software Interface Control
Document (ICD) development
• Ability to obtain secret security clearance
• Ability to Obtain CompTIA Security+ Certification
Desired
Skills:
• Active Secret Clearance
• Systems and/or software engineering
experience or relevant systems engineering
training through a university or certificate program
• Experience with: o Software Requirements Development (DOORS Experience a plus) o SW architecture development o Cross reference SW architecture to system architecture and design o DOD Software CDRL Development o Software Model Development with modeling tool such as Cameo or Rhapsody
• Familiarity with modeling language(s) such as
SysML/UML and Architecture Framework(s) such as DODAF
• Ability to understand code written in programming languages such as C, C++, MATLAB or python
• Familiar with Agile Development Process
• Ability to work 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
Expressi…
Position Requirements
10+ Years
work experience
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