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12 senior software engineer level 3 jobs found

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senior software engineer level 3 Pennsylvania
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Lockheed Martin
Jun 02, 2026
Senior Software Engineer - Level 3 (TS/SCI with Poly)
Lockheed Martin King of Prussia, PA
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 We're seeking a talented and motivated Senior Software Engineer to join our fast-paced...
Lockheed Martin
May 29, 2026
Sr Mass Properties Engineer
Lockheed Martin King of Prussia, PA
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. For over 60 years, the Fleet Ballistic Missile (FBM) team has supported the Navy’s mission to provide affordable and credible strategic defense. We offer unique...
Lockheed Martin
May 27, 2026
Senior DFX Manufacturing Engineer
Lockheed Martin King of Prussia, PA
Description: The mission matters. So do the people behind it. With advancing defense technology at our core, what sets us apart is a culture of collaboration, purpose, and impact. 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. What is the mission? For over 60 years, the Fleet Ballistic Missile (FBM) team has supported the Navy’s mission to provide affordable and credible strategic defense. We offer unique career opportunities and challenges on a program with...
Lockheed Martin
May 23, 2026
Systems Engineer
Lockheed Martin King of Prussia, PA
Description: WHAT WE'RE DOING Want to work with cutting-edge technologies in a fun, fast-paced, and dynamic environment? Are you a problem solver that takes on challenges that others think are impossible? If you answered yes to these questions, then we invite you to join Lockheed Martin Rotary and Missions Systems (RMS) as a Systems Engineer! Lockheed Martin is a global leader in aerospace, defense, and technology solutions. You will be joining Lockheed Martin Rotary and Mission Systems supporting the Tactical Tomahawk Weapons Control System (TTWCS) program in Valley Forge, PA. THE WORK We are in search of an experienced Systems Engineer to join our team. As an Engineering Professional on the TTWCS program, you will perform system engineering efforts leading change packages to the existing software system, performing requirements development, interface design, system architecture, and aid in the design and development of future systems. The work location will be in...
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 06, 2026
Electromagnetic Environmental Effects (E3) Engineer - Level II
Lockheed Martin King of Prussia, PA
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. As an Electromagnetic Engineering Effects (E3) Engineer, you will support the System...
Lockheed Martin
Apr 15, 2026
DevSecOps Engineer, Senior - (Active TS/SCI)
Lockheed Martin King of Prussia, PA
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. Are you a Senior DevSecOps Engineer for something different? In this role you will: +...
Lockheed Martin
Mar 26, 2026
Senior Software Engineer - Radar Modeling and Simulation
Lockheed Martin King of Prussia, PA
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. Who You Are As a Senior Software Engineer in the Radar Modeling and Simulation group, you will develop high performance C++ software. Your contributions will directly support radar modeling, scene modeling, signal construction, signal processing, and radar control processing components within simulation and digital twin environments. Your software will operate as part of a system of systems integrating with external components to enable high volume and high fidelity radar modeling and simulations. You will apply a systems engineering perspective to ensure delivery...
Lockheed Martin
Jun 10, 2026
Software Engineer- Early Career
Lockheed Martin King of Prussia, PA
Description: At Lockheed Martin we 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 Lockheed Martin a great place to work. With our employees as our priority, we provide career opportunities designed to propel development 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. This is a place for engineers, scientists, and problem-solvers who are ready to engage deeply, think critically, and build with purpose. You will not just launch a career. You will be part of something bigger. This is where the best are built. Lockheed Martin Rotary & Mission Systems is seeking a full-time Early Career Software Engineer. As a team member on our Software Engineering team, you can help us take on the world’s most important and complex challenges by providing solutions to a variety of technical...
Lockheed Martin
Jun 04, 2026
Digital Signal Processing (DSP) Software Engineer
Lockheed Martin King of Prussia, PA
Description: WHAT WE ARE DOING: At Lockheed Martin Rotary and Mission Systems, we are driven by innovation and integrity. We believe that by applying the highest standards of business ethics and visionary thinking, everything is within our reach – and yours as a Lockheed Martin employee. Lockheed Martin values your skills, training and education. Come and experience your future! Our programs utilize cutting edge technologies like Software Defined Radios (SDRs), high powered digital signal processing, and modern DevSecOps to support our SEMS portfolio and to dominate the RF spectrum. WHO YOU ARE: We are seeking a motivated and experienced Staff Digital Signal Processing Software Engineer to join our team. At a level 5 this person would be considered an emerging authority with 7+ years of experience working with the following: • Digital Signal Processing development • C++ development and integration • Software Defined Radios (SDRs) • Agile / Scrum methodology THE WORK: As a Staff...
Lockheed Martin
Jun 04, 2026
Software Engineer C++ / Digital Signal Processing
Lockheed Martin King of Prussia, PA
Description: WHO WE ARE At Lockheed Martin Rotary and Mission Systems, we are driven by innovation and integrity. We believe that by applying the highest standards of business ethics and visionary thinking, everything is within our reach – and yours as a Lockheed Martin employee. Lockheed Martin values your skills, training and education. Come and experience your future! As a team member on our Software Engineering team, you can help us take on the world’s most important and complex challenges by providing solutions to a variety of technical problems. Within the RMS SEMS we are seeking a motivated and experienced Software Engineer to support our team. The program enables the warfighter to utilize cutting edge technologies like Software Defined Radios (SDRs), high powered Radio Frequency (RF) Digital Signal Processing (DSP) hardware (HW), and modern DevSecOps to achieve their goals and dominate the RF spectrum. In this important role, you will collaborate with a diverse team of...
Lockheed Martin
Jun 02, 2026
Software Engineer Sr - Archbald, PA
Lockheed Martin Archbald, PA
Description: You will be the Software Engineer Sr for the Automated Test Equipment (ATE) team . Our team is responsible for designing, integrating, and ensuring seamless operation of test systems that support critical missile and sensor programs. What You Will Be Doing As the Software Engineer Sr you will be responsible for architecting, coding, and validating ATE software solutions. Your responsibilities will include, but are not limited to: Develop and maintain ATE software applications using TestStand®, LabVIEW®, and custom C/C++ code. Integrate test‑system hardware, software, and devices under test (DUT) and perform verification and validation. Design and execute Environmental Stress Screening (ESS) and functional testing procedures. Troubleshoot and improve test‑system performance, providing technical support to cross‑functional teams. Document designs, test plans, and results to ensure compliance with program requirements. Why Join...
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