Software Engineer Sr - Level 3 - Top Secret Clearance Required

Lockheed Martin Space is seeking a highly skilled and motivated Software Engineer Sr - Level 3 to join a dynamic Agile team within the Victor Portfolio of Space Security. This role is critical for protecting space assets and involves developing cutting-edge web applications in an open architecture infrastructure across multiple classification domains. The successful candidate will collaborate with a team of Software Engineers, participate in daily scrums, and develop/demonstrate software capabilities to internal and external partners, contributing to a critical space security mission.

Must Have

• Experienced in software development using programming and scripting languages such as Java, JavaScript, C#, Python
• Experience working in an Agile development environment, including tools such as Jira and Confluence
• US citizenship is required to obtain a government security clearance
• Ability to obtain and maintain a Top Secret and SCI clearances

Good to Have

• Experience in application containerization (e.g. Docker, Kubernetes, Helm) in a cloud environment (AWS/Azure/Openstack/Openshift)
• Experience with frameworks such as .NET Core, Angular
• Experience with GitLab CI/CD - Deployment pipelines, automated build, and/or configuration tools
• Experience with databases (PostgreSQL & Redis)
• Strong knowledge of modern technology frameworks, cloud platforms (AWS, Azure, GCP), microservices, APIs, DevOps, and data architecture
• Experience with modern engineering practices such as Cross-Functional Agile teams and Capability-based planning
• Active TS/SCI security clearance
• Bachelor's degree in a related discipline, such as Computer Science, Software Engineering or other engineering disciplines or equivalent experience, with 5 or more years of professional experience; or 3 years of professional experience with a related Master’s degree

Perks & Benefits

• Medical, Dental and Vision coverage
• 401(k) plan with generous matching and company contributions
• Professional development through mentoring, educational programs, networking, and skills enhancement
• Generous parental leave policies and mother's rooms
• Paid Time Off (PTO, paid holidays, jury duty, military obligations)
• Flexible work schedules (Flex-time)

Job Responsibilities

Job ID: 713510BR Date posted: Dec. 17, 2025

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 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.

* This position is contingent upon the program award expected in early 2026.*

Within the Victor Portfolio of Space Security, we are seeking a highly skilled, motivated, and experienced Software Engineer to join our dynamic team. This exciting position will fill a critical need in the new and emerging area of protecting space assets. As part of an Agile team, you will have the opportunity to work on a variety of tasks in various areas across the mission and collaborate with the development teams, contractors, customers, and subject matter experts.

As a key member of the software development team, you will be part of the entire engineering life-cycle, and apply your Software Engineering background to develop web applications in an open architecture infrastructure. If you are looking for a new position in a fast-paced team environment, where every day brings a new challenge, and want to support a critical space security mission, then this is the place for you.

In this position you will

• Collaborate with an exceptional team of Software Engineers implementing solutions and developing new features for a command and control application.

• Serve as a software developer on an Agile team tasked with developing cutting edge web applications within multiple classification domains

• Participate in daily scrums, software sprint/release planning, demos, and retrospectives.

• Develop & demonstrate software capabilities to both internal and external partners.

Successful Applicants will demonstrate effective communication skills, desire challenges and be willing to engage in frequent internal interactions with peers, teammates, and customers.

Selected applicants must meet eligibility requirements for access to classified information, and must maintain the required security throughout the course of employment.

Basic Qualifications:

• Experienced in software development using programming and scripting languages such as Java, JavaScript, C#, Python, etc.

• Experience working in an Agile development environment, including tools such as Jira and Confluence

• US citizenship is required to obtain a government security clearance

• Ability to obtain and maintain a Top Secret and SCI clearances

Desired Skills:

• Experience in application containerization (e.g. Docker, Kubernetes, Helm, etc.) in a cloud environment (AWS/Azure/Openstack/Openshift)

• Experience with frameworks such as .NET Core, Angular, etc.

• Experience with GitLab CI/CD - Deployment pipelines, automated build, and/or configuration tools

• Experience with databases (PostgreSQL & Redis)

• Strong knowledge of modern technology frameworks, cloud platforms (AWS, Azure, GCP), microservices, APIs, DevOps, and data architecture.

• Experience with modern engineering practices such as Cross-Functional Agile teams and Capability-based planning

• Active TS/SCI security clearance

• Bachelor's degree in a related discipline, such as Computer Science, Software Engineering or other engineering disciplines or equivalent experience, with 5 or more years of professional experience; or 3 years of professional experience with a related Master’s degree

Security Clearance Statement: This position requires a government security clearance, you must be a US Citizen for consideration.

Clearance Level: TS/SCI

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 facility.

Work Schedules: 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: 9x80 every other Friday off

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 , 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 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.

If this sounds like a culture you connect with, you’re invited to apply for this role. Or, if you are unsure whether your experience aligns with the requirements of this position, we encourage you to search on Jobs

, and apply for roles that align with your qualifications.

Experience Level: Experienced Professional

Business Unit: SPACE

Relocation Available: Possible

Career Area: Software Engineering

Type: Full-Time

Shift: First

About

At , 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

Qualifications

See what it takes to be a successful employee.

• Collaborative

There is no innovation without imagination. You bring new, different and exciting ideas to the table every day. You are committed to the success of your team.

• Curious

The ability to explore and drive new ideas. You think innovatively to come up with creative solutions to complex challenges.

• Goal-oriented

From planning and organizing to decision making, goal orientation produces impactful results. You set goals and strive to make things happen quickly and efficiently.

• Proactive

The ability to anticipate, plan and prepare for what lies ahead. You act rather than react to potential situations.

• Problem Solver

You work to tackle tough problems with complex solutions.

• Strategic

You observe, reflect and analyze processes to make more informed decisions.

Benefits

• ### Healthcare

Medical, Dental and Vision coverage is available for employees who opt-in.

• ### 401(k)/Retirement Plans

Our 401(k) plan features generous matching and company contributions.

• ### Professional Development

We support our employees through mentoring, internal & external educational programs, networking, skills enhancement and career-building programs.

• ### Maternity and Paternity Leave

Our generous parental leave policies support your journey into parenthood. When you return to work, our facilities offer mother's rooms to support your transition and work/life balance.

• ### Paid Time Off

We offer PTO, paid holidays and paid time off for jury duty and military obligations.

• ### Flex-time

Depending on the position, we offer flexible work schedules.