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326 senior software engineer level 3 jobs found

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Lockheed Martin
May 01, 2026
Senior Software Engineer, Level 3 - Embedded - Clearance Required
Lockheed Martin Littleton, CO
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 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. Space Protection Programs is seeking an experienced Software Engineer who can guide a...
Lockheed Martin
May 01, 2026
Senior Software Engineer, Level 3 - Embedded - Clearance Required
Lockheed Martin Littleton, CO
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 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. Space Protection Programs is seeking an experienced Software Engineer who can guide a...
Lockheed Martin
Apr 30, 2026
Senior Software Engineer, Level 3
Lockheed Martin Littleton, CO
Description: Lockheed Martin is leading the way in hypersonic missile development and we want you to be a part of it! We are creating the first hypersonic boost/glide system for the US Army and Navy here on the Conventional Prompt Strike (CPS) program, and our NGC-SW Integrated Product Team (IPT) is responsible for the algorithms and software that control it. Our group includes the Navigation, Guidance, and Control (NG&C or GN&C) subsystem, which flies the missile and glide body, and the embedded Flight Software (FSW) which hosts the NG&C algorithms and provides health, status, and sequencing for the entire system. Additionally, we develop and maintain the Flight Software testbeds (HILs or HWILs) which provide complete hardware integration testing with feedback and flight simulation to test the NG&C algorithms and flight software. Lockheed Martin Space is seeking a full time Senior Software Engineer. In this role, you will support the software engineering lifecycle...
Lockheed Martin
Apr 29, 2026
Senior Software Engineer, Level 3 - Clearance Required
Lockheed Martin Littleton, CO
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 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. Space Protection Programs is seeking an experienced Software Engineer who can guide a...
Lockheed Martin
Apr 28, 2026
Senior Software Engineer, Level 3 - Clearance Required
Lockheed Martin Houston, TX
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 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 full time Software Engineer. In this role, you will...
Lockheed Martin
Mar 24, 2026
Senior Software Engineer – Level 3
Lockheed Martin Fort Worth, TX
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, 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 dream big, work hard, and have fun doing what you...
Lockheed Martin
Mar 17, 2026
Software Engineer Senior - Level 3
Lockheed Martin Fort Worth, TX
Description: You will be the Senior Software Engineer for the team which is responsible for the development and delivery of software models with the ability to make independent and solid decisions during the software development process. What You Will Be Doing As the Senior Software Engineer you will be responsible for leading the design, development, and delivery of high‑quality software solutions in a lab environment. You will mentor junior engineers, drive architectural decisions, and collaborate closely with cross‑functional teams to ship reliable, scalable, and high‑performing products. Your responsibilities will include: Lead design and development of software solutions. Mentor junior engineers and foster technical growth. Drive architectural decisions and enforce best practices. Collaborate with cross‑functional teams to ensure reliability and scalability. Oversee delivery, testing, and performance optimization of products. What’s In It...
General Dynamics Mission Systems, Inc
May 19, 2026
Sr Software Engineer - C++/Java - Active Secret clearance
General Dynamics Mission Systems, Inc Manassas, VA
Basic Qualifications Requires a Bachelor’s degree in Software Engineering, or a related Science, Engineering, Technology or Mathematics field. Also requires 5+ years of job-related experience, or a Master's degree plus 3 years of job-related experience. Agile experience preferred.     CLEARANCE REQUIREMENTS:  Department of Defense Secret security clearance is required at time of hire . Applicants selected will be subject to a U.S. Government security investigation and must meet eligibility requirements for access to classified information. Due to the nature of work performed within our facilities, U.S. citizenship is required . Responsibilities for this Position At General Dynamics Mission Systems, we build advanced technologies that keep our nation safe and our warfighters prepared. Our engineers tackle some of the most complex and consequential challenges in defense, delivering solutions that redefine innovation and make a...
Lockheed Martin
May 16, 2026
RTS DevSecOps Engineer
Lockheed Martin Boulder, CO
Description: WHO WE ARE Lockheed Martin is a global leader in aerospace, defense, and technology solutions, dedicated to pushing the boundaries of innovation and shaping the future of the industry. With a rich legacy of excellence and a commitment to delivering advanced capabilities to our customers, we are proud to be at the forefront of cutting-edge technology and engineering. LM SPACE: WHAT WE'RE DOING 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. THE WORK Lockheed Martin is seeking a skilled level 3 RTS DevSecOps Engineer with a final Secret security clearance to work from our Boulder, CO location. This is an EARLY-MID CAREER (level 3) ROLE where candidates typically require 3+ years of professional experience and a BS degree. The...
Lockheed Martin
May 15, 2026
Systems Integration & Test Sr - Orlando, FL
Lockheed Martin Orlando, FL
Description: You will be a Systems Integration and Test Senior Engineer for Lockheed Martin's Missiles & Fire Control division. Our team is responsible executing Lab, Ground, and Flight testing to ensure successful development and deployment of critical systems for Platform Expansion (PEX). What You Will Be Doing As the IT&E Engineer, you will be responsible for the following: • Generating and executing sub-system and system level integration and test plans/procedures • Supporting the preparation of test equipment and facilities required for test events • Supporting Design Verification Tests (DVT) and Qualification tests, including Environmental Stress Screening (ESS), Electromagnetic Interference (EMI), and Functional Acceptance Test Procedures (ATP) for new hardware • Support Failure investigations and resolution of hardware, software and test equipment anomalies that have occurred during system and subsystem testing • Provide engineering evaluations of redesigns...
Lockheed Martin
May 15, 2026
Project Engineer Sr
Lockheed Martin Grand Prairie, TX
Description: You will be the Project Engineer Sr – PAC 3 KSA Localization for the Depot Operations team. Our team keeps the PAC 3 missile system humming by managing every piece of hardware and test equipment, customizing sustainment software, and ensuring mission critical parts are always where they’re needed. What You Will Be Doing As the Project Engineer Sr you will be the technical liaison that tailors the 3rd party Sustainment Software Suite, builds and enforces desktop and site operating procedures, and drives flawless inventory accuracy. You’ll sit at the hub of depot logistics, working hand in hand with senior logisticians, shipping partners, and field units to keep the supply chain rock solid. Your responsibilities will include: • Lead the customization of the “Data Mill” repair data software, gathering requirements, steering development, and confirming delivery. • Design and document end to end shipping, receiving, and asset management processes for international...
Lockheed Martin
May 15, 2026
Guidance, Navigation & Control Engineer III (Senior)
Lockheed Martin Sunnyvale, CA
Description: About Lockheed Martin Space : 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. About the Role : This position will support an...
Lockheed Martin
May 15, 2026
Hub/ModStar Senior Software Engineer Staff / Full Stack / Orlando, FL
Lockheed Martin Orlando, FL
Description: You will be the Senior Software Engineer Full Stack for the Hub and ModStar team. Our team designs, develops, and sustains full‑stack applications that power critical MFC missions. What You Will Be Doing As the Senior Software Engineer Full Stack you will be responsible for delivering end‑to‑end software solutions while providing technical leadership to the Hub and ModStar teams. Your responsibilities will include, but are not limited to: Design, develop, and maintain full‑stack web applications from front‑end UI to back‑end services. Provide technical guidance and mentorship to team members, championing best practices and high‑quality code. Collaborate with cross‑functional stakeholders to translate requirements into scalable software designs. Own the CI/CD pipeline implementation and ensure secure, reliable deployments. Monitor performance, troubleshoot issues, and continuously improve application reliability and maintainability....
Lockheed Martin
May 15, 2026
Staff Thermal Analyst
Lockheed Martin Highlands Ranch, CO
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. OVERVIEW: 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. What does this role look like? Lockheed Martin Space is seeking a...
Lockheed Martin
May 15, 2026
Computing Systems/Software Senior Engineer
Lockheed Martin Mount Laurel Township, NJ
Description: What We're Doing As a part of the Lockheed Martin community, we take on challenges and find solutions using creativity and collaboration. If you’re looking to be a part of a passionate team solving these complex problems, then Rotary and Mission Systems is the place for you. The Work Lockheed Martin Rotary and Mission Systems (RMS) in Moorestown, NJ is seeking a full-time Computing Systems/Software Senior Engineer for their Infrastructure, Communications, & Network Engineering team to support multiple Mission Integrated Command & Control (MIC2) Lines of Business (LOB) programs. This role will involve a combination of software development and systems engineering using an Agile, Development, Security, and Operations (DevSecOps) approach. Tasking can include: • Software Design/Development/Integration/Test • Systems Design/Development/Integration/Test • Deriving of program requirements • Integration, test and requirement verification • Configuring...
Lockheed Martin
May 15, 2026
Computing Systems/Software Engineer
Lockheed Martin Mount Laurel Township, NJ
Description: What We're Doing As a part of the Lockheed Martin community, we take on challenges and find solutions using creativity and collaboration. If you’re looking to be a part of a passionate team solving these complex problems, then Rotary and Mission Systems is the place for you. The Work Lockheed Martin Rotary and Mission Systems (RMS) in Moorestown, NJ is seeking a full-time Computing Systems/Software Senior Engineer for their Infrastructure, Communications, & Network Engineering team to support multiple Mission Integrated Command & Control (MIC2) Lines of Business (LOB) programs. This role will involve a combination of software development and systems engineering using an Agile, Development, Security, and Operations (DevSecOps) approach. Tasking can include: • Software Design/Development/Integration/Test • Systems Design/Development/Integration/Test • Deriving of program requirements • Integration, test and requirement verification • Configuring...
Lockheed Martin
May 15, 2026
Sr. Manufacturing Engineer
Lockheed Martin Palmdale, CA
Description: As a Senior Manufacturing Engineer, you will be responsible for developing and optimizing manufacturing processes and procedures to drive operational excellence. You will leverage your expertise in materials, tooling, and process flow to define build sequences and ensure product quality, efficiency, and manufacturability. Key Responsibilities: Develop, implement, and refine manufacturing processes and build sequences based on a strong understanding of materials and fabrication techniques. Evaluate equipment and tool performance to verify efficiency, reliability, and alignment with production requirements. Identify and resolve issues related to tooling, process capability, and production inefficiencies through root cause analysis and corrective action implementation. Collaborate with design engineering teams to provide feedback on design concepts and specifications, ensuring manufacturability and optimal use of available equipment and methods. Operate within a...
Lockheed Martin
May 15, 2026
Systems Engineer
Lockheed Martin Fort Worth, TX
Description: You will be the Systems Engineer for the Vehicle Systems Engineering team which is responsible for delivering reliable, high‑performance aircraft to production. What You Will Be Doing As the Systems Engineer you will be responsible for bridging Vehicle Systems Engineering and Production to ensure F‑35 aircraft meet stringent performance and safety standards. You will work closely with senior engineers, production personnel, and cross‑functional teams to resolve technical challenges and drive continuous improvement. Your responsibilities will include: Collaborate with senior engineers to troubleshoot technical issues on aircraft in production. Lead Root Cause Corrective Action (RCCA) investigations for production and fleet issues. Coordinate and lead test events on production aircraft to support development activities. Update and maintain 3D CAD models and 2D drawings, ensuring compliance with drafting standards and configuration...
Lockheed Martin
May 15, 2026
Systems Engineer Sr Stf - RF/EW Req & Arch
Lockheed Martin Moorestown, NJ
Description: Who We Are Lockheed Martin is dedicated to shaping, developing, & advancing technologies & capabilities with a focus on our customers’ needs as part of our 21st Century Security vision. We foster collaborative innovation, provide opportunities for career development, & empower our employees with the skills needed to create cutting-edge products & solutions that keep our users Ahead of Ready. What We’re Doing As part of our 21st Century Security vision, Lockheed Martin is investing in advancing multi-function sensing capabilities. Our Converged Sensors team is accelerating multi-function aperture & multi-function processing technologies through research, development, & demonstrations. Who You Are Our team is seeking a driven Systems Engineer to help lead the cross-program development & implementation of advanced digital sensor architectures in open architecture platforms with challenging size, weight, power and cost (SWaP-C)...
Lockheed Martin
May 15, 2026
HWIL Integration & Test Engineer, Staff - Dallas, TX
Lockheed Martin Grand Prairie, TX
Description: The HWIL Electrical Design & Integration Engineer (E4) provides senior level technical leadership for the end to end electrical architecture, integration, and verification of real time, closed loop Hardware in the Loop (HWIL) capabilities. With 5 + years of relevant experience, the incumbent operates with technical authority, defines strategy, and influences program wide decisions while representing Lockheed Martin to senior government and industry stakeholders. Core Responsibilities • Technical Architecture & Strategy - Define and evolve the electrical architecture for HWIL test beds, establishing standards for cable harnesses, PCBs, high speed signaling, and RF target generation simulators. • Lead the integration of next generation real time closed loop simulation models • Program Leadership - Serve as a lead HWIL electrical engineer coordinating with cross functional teams (Systems, Software, Mechanical, Integration & Test). • Present technical...
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