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54 principal systems engineer jobs found

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Security Clearance Onsite principal systems engineer
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Lockheed Martin
Apr 06, 2026
Principal Systems Engineer (Radar Integration & Test)
Lockheed Martin Moorestown, NJ
Description: What We’re Doing Here at Lockheed Martin Rotary and Mission Systems (RMS) we take on the most demanding challenges in the world. We seek out innovative ideas and creative solutions to seemingly impossible problems facing our customers in the Sensors, Effectors & Mission Systems (SEMS) organization. We collaborate with the best Radar engineers in the business across the Moorestown, NJ and Syracuse, NY sites to invent solutions where they don’t exist yet. If you’re looking for the challenge of a lifetime on a team of the brightest minds in the world, then Rotary Mission Systems and the Sensor Architectures team is the place for you. If you’re looking for life-long learning and a career where the hard work is the fun part, then you’re in the right place. The Work In your role as a Principal Systems Engineer, you will: • Provide guidance and leadership for program execution across sensor products. • Shape system architectures to strategically drive future...
General Dynamics Mission Systems, Inc
Mar 27, 2026
Senior Principal Systems Engineer
General Dynamics Mission Systems, Inc MD
Basic Qualifications Requires a Bachelor’s degree in Systems Engineering, or a related Science, Engineering, Technology or Mathematics field. Also requires 10+ years of job-related experience, or a Master's degree plus 8 years of job-related experience. Agile experience preferred.     CLEARANCE REQUIREMENTS: Ability to obtain a 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 ROLE AND POSITION OBJECTIVES: As a Systems Engineer, you will work alongside a team of highly talented hardware and software engineers to build new technologies to counter threats of tampering, reverse engineering, and supply chain exploits....
SAIC
Mar 18, 2026
Senior Principal Systems Engineer
SAIC
Description SAIC is seeking a qualified Command, Control, Communications, Computers/Information Technology (C4/IT) Engineer to join our team and provide critical support to Marine Corps Installation Command (MCICOM) Defense Policy Initiative (DPRI) Pacific Posture Military Construction (MILCON) efforts in Guam, Tinian, and Darwin. The ideal candidate will bring extensive, recent experience in providing technical support to project teams and ensuring planning and design efforts meet U.S. Marine Corps (USMC) C4/IT mission capability requirements for each facility within the MCICOM-DPRI framework and/or Naval Information Warfare Center (NIWC) Pacific (PAC) Code-H operations. *THIS IS A FULLY REMOTE ROLE BUT MUST BE LOCAL TO GUAM* The responsibilities for this position include serving as a technical representative and subject matter expert (SME) by providing on-site assessments and answers to Requests for Information; reviewing and commenting on various MILCON C4/IT...
SAIC
Apr 22, 2026
Systems Engineer Sr Principal
SAIC VA
Description SAIC's National Security and Space Sector (NSS) is seeking a Systems Engineer to provide systems engineering and technical advisory (SETA) services to a United States Government (USG) customer in Chantilly, VA. The successful candidate will support technology transition and acquisition for next-generation national security space, air, and ground systems-advancing capabilities from applied research through program baseline insertion. This role requires a professional who can bridge technical and acquisition domains to ensure successful program execution in a fast-paced, mission-critical environment. Roles and Responsibilities: Provide analytical, engineering, technical, and administrative guidance to USG leadership in the execution of special communications capabilities Seek new, unique, and innovative data application concepts, engineering techniques, and technology applications through the interpretation and analysis of data and processes Advise on...
SAIC
Apr 01, 2026
Systems Engineer Principal
SAIC CA
Description JOB DESCRIPTION: SAIC is seeking a motivated and experienced Test and Evaluation Engineer to join our team in El Segundo, CA. SAIC is sub-contractor on the Military Satellite Communications (MILSATCOM) Systems Engineering, Integration and Test (MSEIT) contract. You will join a Systems Engineering team defining the next generation of space communication systems supporting Air Force Military Satellite Communications. You will support Systems Engineering & Integration activities in a multidisciplinary and collaborative environment. The Systems Engineer will interface and collaborate with SE&I team members, contractors, government civilians and members of the USAF. The Systems Engineer will lead and support several working groups responsible for leading technical discussion, resolve and identify risk, requirement gaps, developing briefings, writing, and tracking action items, and authoring meeting minutes. The MILSATCOM Systems Engineering, Integration, and...
SAIC
Mar 11, 2026
Systems Engineer Sr Principal
SAIC VA
Description Join a winning team! Be part of a dynamic team that delivers excellence and quality for the NRO's Systems Engineering Directorate (SED). SAIC is seeking to fill an opening for a Space Enterprise System Engineer to provide Systems Engineering and Technical Assistance (SETA) services to an IC customer. The customer organization we support provides the system enterprise architecting, analysis, and system of systems engineering solutions that determine the current and future national space systems. Make a difference in securing our nation's security through quality engineering and innovation. Responsibilities include but are not limited to: Coordinating and supporting enterprise requirements, CONOPS, and architectures in various domains; supporting enterprise and system level requirements development for future systems; overseeing the allocation and closure of acquisition-level requirements with developers; participation in readiness events in support of...
Lockheed Martin
Apr 23, 2026
Mission Systems Engineer - Clearance Required
Lockheed Martin Littleton, 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. And we’re reimagining how space can connect us, ensuring security and prosperity. We’re creating future-ready solutions, focusing on resiliency and urgency through our 21st Century Security® vision THE WORK Lockheed Martin is seeking a talented Systems Engineer with a Top Secret clearance to...
ECS
Apr 15, 2026
Information System Security Engineer SME
ECS DC
ECS is seeking an Information System Security Engineer SME to work in our Washington, DC office. Please Note: This position is contingent upon contract award. ECS is seeking an experienced Information System Security Engineer (ISSE) - SME to join our team as an expert in designing, implementing, and maintaining secure information systems. The successful candidate will have a strong background in security engineering, architecture, and risk management, with a focus on protecting sensitive information and systems. Responsibilities Responsible for leading the implementation of the Security Assessment and Authorization (SAA) Program: Lead, mentor, and supervise a team of security professionals responsible for the end-to-end implementation of the RMF lifecycle for Enterprise IT systems. Oversee and coordinate activities within the Prepare step, ensuring roles, responsibilities, and risk management strategies are clearly defined and maintained. Guide system...
SAIC
Mar 25, 2026
Principal Field Support Engineer
SAIC AL
Description SAIC is seeking a Principal Field Support Engineer to join our team in Huntsville, AL . The Indicium Product Office is seeking candidates to represent and operate Network, System Integration and Test Environment (NSITE) software. Support typically involves Missile Defense Agency test execution activities (Flight Tests, Ground Tests and Wargames/Exercises). The candidate should also have the ability to perform hardware integration and maintenance, have a basic understanding of computer networking, and a general understanding of computer hardware troubleshooting. The candidate will also be responsible for conducting validating configuration management documentation in support of information assurance certification and accreditation activities. The candidate should be a self-starter and be able operate with minimal supervision. The candidate will support S3I, Redstone Arsenal, Huntsville, Alabama or MDIOC, Schriever SFB, Colorado Springs. Duties and...
SAIC
Mar 11, 2026
Information System Security Engineer
SAIC VA
Description SAIC is seeking an Information System Security Engineer (ISSE) to provide information security support. This position is in McLean, VA and requires an active TS/SCI clearance with Polygraph . This Customer's office is the force of choice for the development of global infrastructure and delivery of solutions that drive influence operations. If you have specialized skills in information security and tech ops, this is the role for you. Job responsibilities include, but are not limited to: Support the Lifecycle Assessment and Authorization (A&A) process. Develop a Systems Security Plan (SSP). Assist and maintain a formal Information Security Program that includes recommendations on continuous improvement of the processes and architectures. Maintain and make accessible documentation of all operational and business process activities in the form of Standard Operating Procedures (SOPs). Monitor and track projects in the A&A queue....
SAIC
Mar 11, 2026
Cyber Engineer Principal
SAIC VA
Description SAIC is seeking a Principal Cybersecurity Engineer to support the AOC Weapons System Falconer Program, and compliant configuration, sustainment, and troubleshooting of mission-critical Command and Control (C2) systems across various Air Operations Centers (AOCs) worldwide. Roles and Responsibilities: Support AOC Weapons System Falconer Program: Provide cybersecurity support for the Air Operations Center (AOC) Weapons System Falconer Program, ensuring mission readiness and operational effectiveness. Compliance and Configuration: Perform compliant configuration of mission-critical Command and Control (C2) systems, adhering to established cybersecurity policies, standards, and best practices. System Sustainment: Sustain and maintain the ongoing functionality and security of C2 systems across various Air Operations Centers (AOCs) worldwide, ensuring continuous operational availability. Troubleshooting and Maintenance: Identify, diagnose,...
SAIC
Mar 11, 2026
Principal Test Engineer
SAIC UT
Description SAIC is seeking an experienced Principal Test Engineer to join our team in support of BAE Systems on the Air Force's Sentinel Program at Hill Air Force Base, Utah. This role supports the acquisition, development, and testing of the next-generation Intercontinental Ballistic Missile (ICBM) weapon system for Sentinel one of the most significant national security priorities. As part of the Integration Support Contract (ISC) team, you will collaborate closely with multidisciplinary teams, prime contractors, and government stakeholders. This is a unique opportunity to lead developmental and operational testing efforts in one of the nation's most important programs. Technical Responsibilities: Develop and validate test strategies and documentation that align with Department of Defense (DoD) and U.S. Air Force (USAF) requirements. Collaborate with range safety teams and support flight test readiness for the Sentinel weapon system. Conduct ground and...
Lockheed Martin
Apr 23, 2026
AURORA Software Engineer - Senior / Embedded / C++ - Orlando, FL
Lockheed Martin Orlando, FL
Description: You will be a Sr. Software Engineer on our team at Lockheed Martin. Lockheed Martin is a global security and aerospace company that employs approximately 114,000 people worldwide and is principally engaged in the research, design, development, manufacture, integration and sustainment of advanced technology systems, products and services. Lockheed Martin Missiles and Fire Control (MFC) is one of four Lockheed Martin business areas. MFC is a recognized designer, developer and manufacturer of precision engagement aerospace and defense systems for the U.S. and allied militaries. MFC develops, manufactures and supports advanced products for military customers that include the U.S. Army, Navy, Air Force, Marine Corps, NASA and dozens of foreign allies. MFC also offers a wide range of products and services for the global civil nuclear power industry and the military’s green power initiatives. What You Will Be Doing As a Sr. Software Engineer, your responsibilities...
Lockheed Martin
Apr 21, 2026
ATWS Software Engineer Asc Manager / Embedded / C++ / Orlando, FL
Lockheed Martin Orlando, FL
Description: You will be a Engineering & Technology (E&T) Associate Manager in the Orlando Software Engineering Department. This role is responsible for all phases of the software development lifecycle including requirements analysis, design, code and unit test, and hardware/software integration and verification. The individual will develop embedded software in C++ and Linux operating system in an Agile environment using JIRA, Git and Confluence. The individual will need to apply appropriate standards, processes, procedures and tools throughout the development lifecycle. Lockheed Martin is a global security and aerospace company that employs approximately 114,000 people worldwide and is principally engaged in the research, design, development, manufacture, integration and sustainment of advanced technology systems, products and services. Lockheed Martin Missiles and Fire Control (MFC) is one of four Lockheed Martin business areas. MFC is a recognized designer, developer...
Lockheed Martin
Apr 21, 2026
IRST Software Test Engineer / Embedded / C++ / Orlando, FL
Lockheed Martin Orlando, FL
Description: One of Lockheed Martin’s premier programs Infrared Search and Track (IRST) program is looking for a Software Test Engineer to support production testing as well as software debugging and code updates. IRST detects and tracks objects that emit electromagnetic radiation – or infrared signatures. More simply put, it’s a type of sensor system that can detect and track threats at long ranges. What makes it unique is its “passive” nature – meaning it can act without emitting any radiation of its own. We call it a “see first, strike first” sensor system because it enables aircrews to target threats, or adversaries, before those adversaries see (or sense) them. This position is responsible for all phases of the software development lifecycle including requirements analysis, design, code and unit test, and hardware/software integration and verification. The individual will develop embedded software in C++ and embedded operating system in an Agile environment using JIRA, Git...
Lockheed Martin
Apr 21, 2026
Cybersecurity Engineer (Level 2-4)
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. Lockheed Martin Space will be hosting an invitation only in-person Hiring Event in King...
Lockheed Martin
Apr 21, 2026
ARISE Analytics Sr. Software Engineer - Orlando, FL
Lockheed Martin Orlando, FL
Description: The ARISE Analytics - Platform team is seeking an enthusiastic and talented Software Engineer to join our team. On this team you will play a critical role in designing, building, and maintaining the underlying platforms that enable our developers to build, deploy, and manage applications efficiently. You will work closely with cross-functional teams to ensure our platforms are scalable, secure, and meet the evolving needs of our business. The ARISE Analytics team works closely with A/AI Research engineers, so a working understanding of Machine Learning principles is desirable. Candidates applying to this position should have a Bachelor's degree, or greater, in Computer Engineering, Software Engineering or an equivalent field with significant software development experience. Lockheed Martin is a global security and aerospace company that employs approximately 114,000 people worldwide and is principally engaged in the research, design, development, manufacture,...
General Dynamics Mission Systems, Inc
Apr 20, 2026
Princ Configuration Management Associate
General Dynamics Mission Systems, Inc San Jose, CA
Basic Qualifications Bachelor's degree in Business, a technical field or equivalent experience plus a minimum of 5 years related experience is required. CLEARANCE REQUIREMENTS: Department of Defense TS/SCI 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 Developing mission-critical systems that help keep people safe is what we do. At General Dynamics Mission Systems, you’ll be part of the team that helps heroes make a true impact. The work we do is important. The challenges we face are career-defining. The opportunity we can offer is one-of-a-kind. We apply advanced technologies such as Artificial Intelligence, Blockchain, AR/VR, Cloud Native and...
Lockheed Martin
Apr 15, 2026
JASSM Production Senior Software Engineer / Embedded / C++ / Troy, AL
Lockheed Martin Troy, AL
Description: As one of Lockheed Martin’s first cruise missiles, JASSM has experienced over 20 years of successful partnership with the U.S. Air Force, providing continued significant long-range, precision engagement capabilities for air-to-ground missions. The combat proven and mission effective weapon system is designed to destroy high-value, well-defended, fixed and relocatable targets from significant standoff range, keeping aircrews well out of danger from hostile air defense systems without compromise to lethality or reach. This position is responsible for all phases of the software development lifecycle including requirements analysis, design, code and unit test, and hardware/software integration and verification. The individual will develop embedded software in C++ and embedded operating system in an Agile environment using JIRA, Git and Confluence. The individual will need to apply appropriate standards, processes, procedures and tools throughout the development...
Lockheed Martin
Apr 15, 2026
JASSM Senior Software Test Engineer / Embedded / C++ / Orlando, FL
Lockheed Martin Orlando, FL
Description: As one of Lockheed Martin’s first cruise missiles, JASSM has experienced over 20 years of successful partnership with the U.S. Air Force, providing continued significant long-range, precision engagement capabilities for air-to-ground missions. The combat proven and mission effective weapon system is designed to destroy high-value, well-defended, fixed and relocatable targets from significant standoff range, keeping aircrews well out of danger from hostile air defense systems without compromise to lethality or reach. AGM-158 is adding many improvements to the system, including many classified algorithms, enhanced Software (C++) and several new classified subsystems. This position is responsible for all phases of the software development lifecycle including requirements analysis, design, code and unit test, and hardware/software integration and verification. The individual will develop embedded software in C++ and embedded operating system in an Agile environment...
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