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50 principal systems engineer jobs found

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Security Clearance 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 11, 2026
Principal Systems Engineer
SAIC UT
Description SAIC is seeking an exceptional Principal Systems Engineer to provide critical interface management and integration support to one of the Department of Defense's most complex and vital acquisition efforts - the Sentinel Intercontinental Ballistic Missile (ICBM) Program. This position offers a unique opportunity to contribute to the modernization of the U.S. Air Force's land-based strategic deterrent, ensuring its operational readiness and sustainability well into the 21st century. This position is located at Hill AFB, UT. The Sentinel ICBM Program, formerly known as the Ground Based Strategic Deterrent (GBSD), is a massive, multi-faceted initiative to replace the aging LGM-30G Minuteman III weapon system. This career-defining program involves designing and integrating advanced ballistic missile systems, refurbishing or replacing key infrastructure, and fielding state-of-the-art command, control, and support systems. As a Senior Systems Engineer, you will provide...
SAIC
Apr 01, 2026
Sr Principal Systems Engineer (IO)
SAIC CA
Description SAIC is looking for a cleared Systems Engineering candidate to provide technical assistance and recommendations regarding the planning, implementation, and management of Battlespace Awareness and Information Operations (IO) systems. Support includes providing high quality engineering advisory services as they relate to evaluating future capability requirements, training and planning support, assisting in the development of doctrine, tactics, techniques, and procedures, advocating requirements in support of future effects-based warfare, assessment of Research & Development (R&D) and Science and Technology (S&T) efforts, and managing functional data for Information Operations for our U.S. Navy Information Operations customer located at the Naval Information Warfare Systems Command site in Old Town San Diego. The selected individual will: The contractor shall provide systems engineering and technical support for ongoing Information Operations and advanced...
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 08, 2026
Systems Engineer Sr Principal
SAIC VA
Description SAIC is seeking an Acquisition Systems Engineer to join the Air Force, Space and Intelligence Business Group (AFSI) in our Chantilly, VA office. AFSI provides specialized acquisition, engineering, analysis and operations support to a variety of Intelligence Community (IC) and Department of Defense (DoD) customers. Our program supports the research and development of the generation after next of national security-related systems based in space, in the air and on the ground. AFSI has an opening for an Acquisition Systems Engineer to work closely with a diverse team of engineers and scientist developing and implementing the future ground-based architecture. This position provides Acquisition discipline to an organization supporting the research and development of revolutionary ground-based systems. This position supports the development and execution of program activities acquiring cutting edge capabilities and prototypes. Unique Duties: • Work with...
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...
General Dynamics Mission Systems, Inc
Apr 14, 2026
Senior Principal Software Engineer for Crypto & Cross Domain Solutions
General Dynamics Mission Systems, Inc Scottsdale, AZ
Basic Qualifications Requires a Bachelor’s degree in Software 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: 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 software engineer for the Space, Cyber, and Intelligence (SC&I), you’ll lead a cross functional team responsible for developing the crypto and cross domain solution products.     We encourage you to apply if you have...
ECS
Apr 01, 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...
LMI
Mar 20, 2026
Mission Engineering Manager - Clearance Required
LMI Tysons, VA
Overview We’re building the next generation of RFID, GPS tagging, and sensor-mesh solutions that power mission-critical operations across the DoD. Our products move data, but more importantly, they move missions. As our Mission Engineering Manager, you’ll define the architecture, guide the accreditation path, and lead the engineers that make it real. You’ll be the technical backbone of our delivery—ensuring every system is secure, compliant, and ready to perform where it matters most.     This position requires a Secret clearance.     Hybrid (U.S.-Based) | Some Travel Required | Primary work location in Washington,DC; Norfolk, VA; or Mechanicsburg, PA     LMI is a new breed of digital solutions provider dedicated to accelerating government impact with innovation and speed. Investing in technology and prototypes ahead of need, LMI brings commercial-grade platforms and mission-ready AI to federal agencies at commercial speed....
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 14, 2026
Information System Security Manager (ISSM)
Lockheed Martin King of Prussia, PA
Description: Who we are: Lockheed Martin is a pioneer in cyber security—partnering, innovating, and building cutting edge solutions. Our talented employees tackle the world’s toughest engineering challenges every day, leveraging their unique skills and experiences to design and deliver breakthrough technology. We empower our people to think big, perform with excellence, and create extraordinary products. If you have the passion and courage to dream boldly, join our culture and help build a better tomorrow. We provide the resources, inspiration, and focus you need to succeed. What We’re 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. As a cyber security professional at Lockheed Martin, you'll be part of...
Lockheed Martin
Apr 09, 2026
EOTS Software Engineer / Embedded / C++ - Orlando, FL
Lockheed Martin Orlando, FL
Description: You will be a Software Engineer on our EOTS team at Lockheed Martin. The Electro-Optical Targeting System (EOTS) is the world’s first sensor that combines forward-looking infrared (FLIR) and infrared search and track (IRST) functionality. 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...
Lockheed Martin
Apr 09, 2026
LRASM Embedded S/W Engineer Associate - Orlando, FL
Lockheed Martin Orlando, FL
Description: You will be a Software Engineer supporting our LRASM program. LRASM is a precision-guided intelligent anti-ship missile design to interdict a variety of surface threats at very long range, navigating semi-autonomously to the target, and delivering a precise payload from safe, standoff range. LRASM brings additional, advanced long-range sea and land strike capabilities to the B-1B, F/A 18E/F and soon to 5th Generation F-35B/C fleet, P-8 and F-15 with ongoing integration efforts. 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....
Lockheed Martin
Apr 08, 2026
Principal Sensor Systems Architect
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. Lockheed Martin. Your Mission is Ours. The Work In your role as a Principal Sensor Systems Architect, you will: • Provide guidance and leadership for program execution across sensor products. • Shape system...
Lockheed Martin
Apr 08, 2026
Software Engineer Senior - Embedded, Dallas, TX
Lockheed Martin Grand Prairie, TX
Description: 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. As a Software Engineer at MFC, you will join one of the largest networks of software professionals, implementing cutting edge technologies on both...
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