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Software Engineer Sr - level 3 Security Clearance

Job in Fort Worth, Tarrant County, Texas, 76101, USA
Listing for: Lockheed Martin
Full Time position
Listed on 2026-03-12
Job specializations:
  • Software Development
    Software Engineer, DevOps
Job Description & How to Apply Below
Position: Software Engineer Sr - level 3 with Security Clearance
Job Number 720136

Description:

You will be the Software Engineer Sr for the Simulation & Systems Labs (SSL) which is responsible for delivering advanced simulation and integration solutions that empower warfighters worldwide. What You Will Be Doing As the Software Engineer Sr you will be responsible for integration and troubleshooting of SSS software products in hardware-in-the-loop and man-in-the-loop lab environments, while contributing to the design, development, and deployment of real-time simulation systems.

Your responsibilities will include:
* Integrate and troubleshoot SSS software in HIL and MIL lab environments.
* Develop and maintain distributed real-time simulation code for aircraft and hardware interfaces.
* Apply technical principles to reuse existing software and support digital transformation initiatives.
* Collaborate within an Agile, Dev Sec Ops  team to deliver high-quality, mission-critical capabilities.
* Support flight-testing activities and ensure solutions meet customer requirements. 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. 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, then we want to build a better tomorrow with you. Who You Are You are a collaborative software engineer with a strong background in integration, real-time systems, and simulation environments.

You thrive in fast-paced Agile settings, bring ethical rigor to every task, and are driven to deliver impactful solutions that directly support our warfighters. Further Information About This Opportunity MUST BE A U.S. CITIZEN - This position is located at a facility that requires special access. The selected candidate must be able to obtain a secret clearance.

Basic Qualifications:

Software Development Experience using C++ Experience developing software on Linux Bachelor's degree in an Engineering/Technical
Field (STEM)
Desired

Skills:

Experience with Continuous Integration (CI) and tools, such as Jenkins, Git, and Bitbucket

Experience with real-time software development & integration

Experience with Real-Time Operating Systems

Experience with automated testing Experience performing software integration in hardware-in-the-loop and/or man-in-the-loop simulation environments

Experience with Agile software development methodologies and tools, such as Jira An extreme interest in anything airborne, such
as fighter aircraft and airplanes Strong oral and written communication skills Strong interpersonal and collaboration skills Strong work ethic and self-motivation Active F-35 program access
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: 4x10 hour day, 3 days off per week
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.…
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