Senior Software Engineer – Level 3

JOB ID: 720661BR

Date posted: Mar. 23, 2026

Description:

The Fusion team is looking for an experienced, process‑driven C++ developer to join our simulation team. In this role you will integrate third‑party models and build detailed simulations for our testing environment, ensuring the Fusion product is delivered efficiently and with the highest quality.
The ideal candidate demonstrates excellent problem‑solving abilities, a collaborative mindset, and a proven capacity to work independently.

What’s In It For You:

From onsite to remote, we offer flexible work schedules to comprehensive benefits investing in your future and security,
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 dream big, work hard, and have fun doing what you love then we want to build a better tomorrow with you.
\*\*\*Must be a US Citizen. This position is located at a facility that requires special access and an Interim Secret clearance required to start.\*\*\*

Basic Qualifications:

• Bachelor's degree in Computer Science or Software Engineering
• Experience coding in C++
• Experience Analyzing Requirements
• Experience troubleshooting software & defect resolution
• Familiar with git

Desired Skills:

• Experience coding in C# or Python
• Experience working in Agile teams
• Experience with Linux operating systems
• Experience with Jira and GitLab
• 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 with Investigation or CV date within 5 years

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.
Join us at Lockheed Martin, where your mission is ours. Our customers tackle the hardest missions. Those that demand extraordinary amounts of courage, resilience and precision. They’re dangerous. Critical. Sometimes they even provide an opportunity to change the world and save lives. Those are the missions we care about.
As a leading technology innovation company, Lockheed Martin’s vast team works with partners around the world to bring proven performance to our customers’ toughest challenges. Lockheed Martin has employees based in many states throughout the U.S., and Internationally, with business locations in many nations and territories.

Experience Level:

Experienced Professional

Business Unit:

AERONAUTICS COMPANY

Relocation Available:

Possible

Career Area:

Software Engineering

Type:

Full-Time

Shift:

First

At Lockheed Martin, we apply our passion for purposeful innovation to keep people safe and solve the world's most complex challenges.

Pioneering Defense Technology: From aerospace to outer space to cyber space, you can innovate mission solutions alongside the best minds in the business.

United By Culture: Excellence, integrity, and collaboration define us. We accelerate change and embrace one another’s perspectives to win for our customers.

Real Impact, Real Growth: Grow your career and skills for life. Our wide array of opportunities and technology-driven learning programs enable your development and agility.

Your Health, Your Wealth, Your Life: Competitive pay, comprehensive benefits and flexible schedules designed so you thrive — at work and beyond.

Empowered to Be Your Best: Use your strengths to make a difference in the lives of one another, our customers, our communities, and our planet.

Here, the possibilities are endless because we offer:

Flexible Schedules, dependent on role

Levels: Student, Entry, Mid, Senior, Management

Locations: Nationwide & OCONUS Positions