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Senior Software Engineer; Level III - Top Secret clearance

Job in Littleton, Arapahoe County, Colorado, 80121, USA
Listing for: Lockheed Martin Corporation
Full Time position
Listed on 2026-06-19
Job specializations:
  • Engineering
    Systems Engineer
Job Description & How to Apply Below
Position: Senior Software Engineer (Level III) - Top Secret clearance
Description:

Position details:

Location:

Littleton, CO

Work Schedule:

9x80

Position type:
Full-time onsite (this is not a hybrid position)

_____________________________________________

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 reimagining 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.

Lockheed Martin Space is seeking a Senior Software Engineer to join our team in Littleton, CO! By joining the Lockheed Martin Space Radio Frequency (RF) Talent Center (RFTC) team, you will contribute our mission supporting challenging programs related to Space Vehicles, Hypersonics, Human Space Flight and Interplanetary Missions, Missile Defense, and more.

In this engineering role within LM Space, you will:

* Support the Global Security portfolio of programs by supporting payload analysis tool development on world class RF Payloads across various stages in each program's lifecycle.

* Engage in system requirements flow-down to test and verify mission performance.

* Lead troubleshooting anomaly resolution.

* Work closely with other RF Engineers, Box and Sub-systems CPEs, leaders, and Subject Matter Experts to ensure a given program within Global Securities is successful.

* Partner with customers and program leadership to ensure the success of payload products and milestones.

* Demonstrate subject matter expertise on payload analysis tools and mission execution.

What you will gain in this role:

* Deep expertise in payload data processing and the mission

* Expand your engineering and software proficiency through challenging, real‑world projects

* Collaborative experience working side‑by‑side with a high‑performing team of engineers

* High‑impact engagement with the customer on technical discussions and interchanges

* Accelerate your skills to take on engineering growth opportunities

* Hands‑on involvement in a cutting‑edge mission area that delivers tangible, real‑world results

* Contribute to our armed forces' ability to execute their duties safely and bring our service members home

#NSSGS

#SpaceRF

#SpaceNSS

Basic Qualifications:

* Experience developing software using the

Python, C# and/or C++ programming

languages.

* Working knowledge of Agile methodologies

* Experience with Linux and Windows

Security Clearance / Work Authorization:

* To meet requirements of the program/customer, this position requires the selected employee to be a U.S. Citizen.

* Prior to starting employment, selected candidates will be required to possess Top Secret clearance. For this position, applicants must possess a currently Active Top Secret security clearance to be considered.

* Selected candidates will be required to obtain, and maintain, Top Secret with adjudicated SCI Eligibility (i.e. TS/SCI) for long term employment on this program

Desired

Skills:

* Bachelor's or Master's degree from an

accredited college/university in Computer

Science, Computer Engineering, Computer

Information Systems, Electrical Engineering,

Mathematics or related discipline.

* Experience working independently with limited

direction to complete assigned tasks.

* Experience collaborating effectively with a

team of users and other software developers.

* Strong computer network troubleshooting skills

* Experience with software tools to perform

version control (git, svn), peer reviews (code

collaborator), code comparison (beyond

compare), and bug/issue reporting (Jira).

* Experience with object-oriented software

design and design patterns.

*…
Position Requirements
10+ Years work experience
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