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330 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 13, 2026
Manufacturing Technical Training Specialist
General Dynamics Mission Systems, Inc Pittsfield, MA
Basic Qualifications Bachelor's degree or equivalent combination of education and relevant work experience is required plus a minimum of 5 years of relevant experience; or Master's degree plus a minimum of 3 years of relevant experience.   CLEARANCE REQUIREMENTS: : Department of Defense Secret security clearance is obtainable within a reasonable amount of time after 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 Imagine a world-class engineering environment. Now add a team of exceptional talent along with technologies that are so advanced they’re often classified. That’s what you’ll find at General Dynamics Mission Systems. Here you’ll lead amazing engineers as they invent the technologies,...
U. S. National Security Agency
May 13, 2026
Structural / Civil Engineer - Facilities - Entry to Experienced Level (Maryland)
U. S. National Security Agency Fort Meade, MD
Responsibilities: Be a part of our mission to protect the national security of the United States, and have a direct impact to enable success in Agency operations. As a Structural Engineer, you will have the opportunity to work directly with mission customers to validate the requirements and unique needs to provide reliable technical solutions. With the ever-changing industry and increase of technology complexities to accommodate our workforce, the National Security Agency's (NSA) Installation & Logistics organization needs motivated Engineers with expertise to provide facilities design expertise, guidance, and support to the development and implementation of facilities solutions that enable capabilities that align with mission driven priorities. NSA currently has opportunities for highly motivated Structural Engineers. Our Structural Engineers solve complex mission driven facilities issues and are responsible for engineering services in the planning, design, construction,...
U. S. National Security Agency
May 13, 2026
Industrial Control System Specialist - Entry to Experienced Level (Maryland)
U. S. National Security Agency Fort Meade, MD
Responsibilities: The National Security Agency (NSA) currently has opportunities for highly motivated Industrial Control System (ICS) Specialists/Engineers to provide expertise in the design, construction, commissioning, and operation of new and renovated electrical and mechanical infrastructure. This position has two areas of focus, one within Design and Engineering (D&E) and the other with Operations and Maintenance (O&M). As an ICS Specialist/Engineer within D&E, you will work closely with multidisciplinary teams encompassing project managers, stakeholders, and contractors throughout the entirety of the project life-cycle, including close coordination with O&M. You will also be responsible for the development and review of designs, specifications, technical reports, and cost estimates for power monitoring and control of electrical and mechanical infrastructure, energy management monitoring, and ICS cybersecurity. As an ICS Specialist/Engineer within O&M,...
SAIC
May 13, 2026
Senior Software Engineer
SAIC CA
Description SAIC is looking for a Senior Software Engineer for a position located in San Diego, CA . This position needs to be highly experienced in JavaScript, React, Linux (RHEL), and has a strong background in Web Experience. This role requires you to have an ACTIVE SECRET clearance to star t. *This will be an ON-SITE role with expected travel up to 10% throughout the year.* JOB DUTIES: The candidate shall perform software engineering design and development activities to produce reliable, modular, and secure software components. The work will include development of software on a RHEL OS platform. This will include software development with custom C++ based applications, X windows-based applications, and web-based middleware. Development will consist of application writing and policy for security accreditations. Qualifications REQUIREMENTS : Bachelors and five (5) years or more experience; Masters and three (3) years or more experience; PhD...
Lockheed Martin
May 12, 2026
ASIC & FPGA Design Engineer Sr
Lockheed Martin Orlando, FL
Description: You will be the Senior ASIC & FPGA Design Engineer for the Command Launch Assembly (CLA) FPGA team within Missiles & Fire Control (MFC). Our team delivers the digital heart beat that powers the Next Generation Short Range Interceptor (NGSRI), turning system level performance and safety goals into reliable, production ready FPGA hardware for the United States and allied forces. What You Will Be Doing As the senior ASIC & FPGA designer you will own the full lifecycle of the CLA FPGA—from high level architecture through release ready documentation—while mentoring junior talent and partnering with a broad set of cross functional experts. Your responsibilities will include: • Defining FPGA architecture and drafting design specifications; writing clean RTL in VHDL/Verilog/SystemVerilog that satisfies performance, power, and reliability targets. • Developing synthesis, place and route, and timing closure strategies to guarantee deterministic operation on the...
Lockheed Martin
May 12, 2026
Cyber Integration Engineer Sr - (Represented)
Lockheed Martin Mount Laurel Township, NJ
Description: WHAT WE’RE DOING At Lockheed Martin Rotary and Mission Systems, we are pushing the boundaries of innovation in defense and technology. Our Integrated Warfare Systems & Sensors (IWSS) Line of Business delivers cutting-edge solutions to support national defense. We uphold the highest standards of ethics and visionary thinking to build a safer and more secure world. THE WORK We are seeking a highly skilled and experienced Senior Cyber Software Engineer with a strong background cyber capability development and integration. In this role, you will be an integrated member of an Agile Cyber Product Team, supporting multiple programs within the IWSS organization. Responsibilities will include the full scope of the systems engineering process with a focus in cyber capability development and integration. Tasking will include requirements development and analysis, capability design documentation, product selection, development, integration, regression testing,...
Lockheed Martin
May 12, 2026
Cyber Software Engineer Senior Staff – DSP
Lockheed Martin King of Prussia, PA
Description: You should participate in our External Referral Program. Click here to submit a referral. If your referral is hired, you'll receive a $3000 payment! code-extrefer This position may be eligible for a $25K sign on bonus for external hires! Cyber Software Engineer Senior Staff – DSP WHAT WE’RE DOING Lockheed Martin, Cyber & Intelligence invites you to step up to one of today’s most daunting challenges: the evolving threat of cyber warfare. As a cyber security professional at Lockheed Martin, you’ll protect the networks that our citizens and the world depend upon each minute. Here, you’ll work with cybersecurity experts on the forefront of threat protection and proactive prevention. In this fast-paced, real-world environment, you’ll draw on all your education and experience as well as the resources of Lockheed Martin to keep the threats at bay. THE WORK The GG SIGNAL SWE / Cyber Software Engineer Senior Staff – DSP is leading multi faceted mission critical...
Lockheed Martin
May 08, 2026
Chief Engineer Sr Manager - FULL TIME REMOTE
Lockheed Martin King of Prussia, PA
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  As the Chief Engineer Senior Manager for the Accelerating Command and Control Transition, you will provide technical leadership for a multidisciplinary team of Engineering Project Managers (EPMs) and senior engineers. You will drive four strategic areas – Advanced Communications, AI enabled mission applications, C2 planning for autonomous systems, and edge based cross domain C2 fire to target to engage air (F2T2EA) solutions. The team works closely with internal research (IRAD), contracted R&D (CRAD), and capture initiatives to prototype, demonstrate, mature, and field these capabilities at speed and scale. Partnering closely with the Advanced Concepts, Line of Business Chiefs...
Lockheed Martin
May 08, 2026
Aeronautical Engineer Sr - Level 3
Lockheed Martin Fort Worth, TX
Description: You will be the Aeronautical Engineer Sr for the Fort Worth Thermodynamics team which is responsible for advancing aircraft thermal performance and reliability. What You Will Be Doing As the Aeronautical Engineer Sr you will be responsible for supporting F 35, Integrated Fighter Group (IFG), and Advanced Development Programs (ADP) Lines of Business in delivering cutting edge thermodynamics solutions. Your responsibilities will include: • Perform Thermal Structural Analysis to ensure integrity under extreme conditions. • Conduct Bay Ventilation Analysis for optimal airflow and temperature control. • Develop and validate Environmental Control Systems (ECS) and Power & Thermal Management Systems (PTMS). • Design and test Thermal Management Systems (TMS) for aircraft subsystems. • Integrate, test, and qualify Thermal Avionics for mission critical performance. What’s In It For You We are committed to supporting your work life balance and overall well being, offering...
Lockheed Martin
May 08, 2026
Senior Systems Engineer - Radar Signal and Data Processing
Lockheed Martin Moorestown, 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 & Mission Systems is seeking a full-time Senior Systems Engineer. In this role, you will lead the design, analysis, testing, and requirements development and verification of high performance Radar Signal Processing systems. The successful candidate will have experience and/or knowledge of Radar Signal Processing, MATLAB Simulation Development, Requirements Development and Testing and Model Based System Engineering. This position is located at a facility that requires special access and will require a government security clearance. U.S. Citizenship is required. Basic Qualifications: • Bachelor's degree in Electrical or Computer Engineering or equivalent...
Lockheed Martin
May 08, 2026
Staff Program Quality Engineer
Lockheed Martin Grand Prairie, TX
Description: You will be the Staff Program Quality Engineer for the Missiles and Fire Control (MFC) functional Quality Engineering Team. Our team is responsible for delivering a unified auditing and CAPA platform that meets corporate, business‑area, and regulatory requirements. What You Will Be Doing As the Staff Program Quality Engineer you will be responsible for bridging quality‑system expertise with software development to create and sustain the LMQC solution. Your responsibilities will include, but are not limited to: Partner with MFC SMEs to capture and document functional requirements for LMQC. Participate in agile sprints, acting as the quality advocate during design and code reviews. Develop and execute integration, system, and user acceptance test cases, ensuring data integrity. Lead data migration and CAPA process integration to guarantee traceability and AS9100 compliance. Design and deliver training programs and documentation for end...
Lockheed Martin
May 08, 2026
Network Engineer
Lockheed Martin Jacksonville, AR
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. WHAT WE'RE DOING At Lockheed Martin, we're revolutionizing the aerospace and defense sector through groundbreaking technology, advanced manufacturing processes, and a world-class team of professionals. Our mission-driven approach and unwavering dedication to excellence ensure that we continue to deliver superior products and solutions to our customers around the world. THE WORK We are seeking a highly skilled Senior Network Engineer to design, implement, and maintain our mission critical network and server infrastructure that supports Aircrew Training Devices (ATDs) and Learning Management Systems (LMS)....
Lockheed Martin
May 07, 2026
CNC Machining Capability Project Engineer
Lockheed Martin Grand Prairie, TX
Description: You will be the CNC Machining Capability Project Engineer for the Machining Capability Team. Our team is responsible for evaluating, selecting, and developing external machining suppliers for complex CNC milling and turning operations. What You Will Be Doing As the CNC Machining Capability Project Engineer you will be responsible for translating capability data into strategic sourcing decisions that drive cost savings, revenue protection, and market competitiveness. You will partner with Supply Chain, Strategic Sourcing, Supplier Quality, and Operations to ensure supplier performance. Your responsibilities will include, but are not limited to: Lead technical assessments of machining suppliers, including CNC 3‑5 axis capabilities, tolerances, and material expertise. Support RFQ/RFP reviews by analyzing drawings, manufacturability, cycle times, and cost drivers. Provide hands‑on machining expertise to bridge engineering intent and supplier...
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