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Senior Software Engineer, Level 3 - Clearance Required

Job in St. Louis, Saint Louis, St. Louis city, Missouri, 63105, USA
Listing for: Lockheed Martin
Full Time position
Listed on 2026-07-06
Job specializations:
  • Software Development
    Software Engineer, Unix/Linux, C++ Developer, DevOps
Salary/Wage Range or Industry Benchmark: 93200 - 164450 USD Yearly USD 93200.00 164450.00 YEAR
Job Description & How to Apply Below
Location: St. Louis

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 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 advancing spacecraft and the workforce to fuel the next generation, reimagining how space can connect us and ensure security and prosperity.

Lockheed Martin Space is seeking a full‑time Software Engineer. In this role, you will support the software engineering lifecycle following the program Software Development Plan (SDP): requirements analysis, object‑oriented analysis & design, code & unit testing, integration, and support for formal test/delivery.

The successful candidate will have experience and/or knowledge of languages such as C or C++. Must be a US Citizen; this position requires Final Secret government security clearance prior to starting and will be located at a facility that requires special access.

Basic Qualifications
  • Experience with programming languages such as C or C++.
  • Standard teaming:
    Ability to work with multi‑disciplined teams.
  • Experience with full software life‑cycle development including SW design, architecture and integration & test.
  • Active/Final Secret Clearance.
Desired Skills
  • Real Time Operating System (RTOS) experience – Green Hill or VxWorks.
  • Knowledge of Agile Software Development.
  • Excellent written and verbal communication skills.
  • Knowledge of Model Base Systems Engineering (MBSE).
  • Previous experience writing and designing to software requirements.
Security Clearance

This position requires a government security clearance. You must be a US Citizen for consideration. Clearance Level: Secret.

Work Schedule

Onsite full‑time.

Schedule:

9x80 every other Friday off.

Salary and Benefits

Annual base salary ranges from $93,200 to $164,450 in California, Massachusetts, New York (excluding major metropolitan areas), Colorado, Hawaii, Illinois, Maryland, Minnesota, New Jersey, Vermont, Washington or Washington DC. For other states, the salary range will reflect the candidate’s final work location. The salary information is a general guideline only.

Benefits include:
Medical, Dental, Vision, Life Insurance, Short‑Term and Long‑Term Disability, 401(k) match, Flexible Spending Accounts, Employee Assistance Program, Education Assistance, Parental Leave, Paid Time Off, and Holidays. Incentive plan eligible.

Equal Opportunity Employer

Lockheed Martin is an equal opportunity employer. Qualified candidates will be considered without regard to legally protected characteristics.

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Position Requirements
10+ Years work experience
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