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115 systems security engineer jobs found

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Lockheed Martin
May 23, 2026
Cyber Systems Security Engineer
Lockheed Martin Manassas, VA
Description: WHAT WE’RE DOING At Lockheed Martin - Rotary and Mission Systems, we're shaping the future of Undersea Warfare (USW) systems. Our mission is to develop innovative technologies that secure our nation’s defense. We are integrating state-of-the-art cybersecurity solutions into mission-critical systems to ensure resilience, integrity, and continued superiority under the sea and across domains. THE WORK As a Cyber Systems Security Engineer, you will take a leadership role in enhancing cybersecurity across SWFTS (Submarine Warfare Federated Tactical Systems). You’ll drive the development and integration of modern cyber solutions that protect and empower critical Department of Defense (DoD) assets. Key responsibilities include: Designing, implementing, and maintaining security controls to protect system confidentiality, integrity, and availability Leverage guidance from Risk Management Framework (RMF), Security Requirements Guides (SRG), and Security Technical...
Lockheed Martin
May 23, 2026
Cyber Systems Security Engineer
Lockheed Martin Manassas, VA
Description: WHAT WE’RE DOING At Lockheed Martin - Rotary and Mission Systems, we're shaping the future of Undersea Warfare (USW) systems. Our mission is to develop innovative technologies that secure our nation’s defense. We are integrating state-of-the-art cybersecurity solutions into mission-critical systems to ensure resilience, integrity, and continued superiority under the sea and across domains. THE WORK As a Cyber Systems Security Engineer, you will take a leadership role in enhancing cybersecurity across SWFTS (Submarine Warfare Federated Tactical Systems). You’ll drive the development and integration of modern cyber solutions that protect and empower critical Department of Defense (DoD) assets. Key responsibilities include: Designing, implementing, and maintaining security controls to protect system confidentiality, integrity, and availability Leverage guidance from Risk Management Framework (RMF), Security Requirements Guides (SRG), and Security Technical...
Lockheed Martin
Mar 16, 2026
Cyber System Security Engineer
Lockheed Martin Herndon, VA
Description: The coolest jobs on this planet... or any other... are with Lockheed Martin Space. At the dawn of a new space age, Lockheed Martin Space is a pioneer, partner, innovator, and builder. Our amazing people are on a mission to make a difference in the world. Every single day, we use our unique skills and experiences to craft, design, and build solutions to some of the world's hardest engineering problems. Our culture inspires our employees to dream big; perform with excellence; and build incredible products. We provide the resources, the support, and the focus. You bring the passion and courage to envision limitless possibilities. Together, we'll build a better tomorrow. Are you ready to further your career in Cyber Security by working for one of the top companies in the world? The Kayenne program is seeking a Cyber Security Engineer technical lead for the Program’s Cyber Team. This team is responsible for applying an interdisciplinary, collaborative approach to plan,...
General Dynamics Mission Systems, Inc
Jun 01, 2026
Sr Advanced Space Systems Engineer- Chantilly, VA
General Dynamics Mission Systems, Inc Chantilly, VA
Basic Qualifications Requires a Bachelor’s degree in Systems Engineering, or a related Science, Engineering, Technology or Mathematics field. Also requires 8+ years of job-related experience, or a Master's degree plus 6 years of job-related experience. Agile experience preferred. .   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 GDMS Sr. Advanced Systems Engineers analyze, design, develop and test GDMS systems to ensure the integration of software, hardware, reliability, maintainability, safety and other requirements in the total engineering effort.   Responsibilities include...
General Dynamics Mission Systems, Inc
Jun 01, 2026
Mid-level C++ Software Engineer
General Dynamics Mission Systems, Inc Manassas, VA
Basic Qualifications Requires a Bachelor’s degree in Computer Engineering, Software Engineering, Computer Science, 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 ROLE AND POSITION OBJECTIVES: We are seeking a highly skilled and experienced Software Engineer to join our dynamic team focused on undersea sensor systems. In this role, you will be responsible for designing, developing, and...
General Dynamics Mission Systems, Inc
Jun 01, 2026
Senior Advanced C++ Software Engineer
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 8+ years of job-related experience, or a Master's degree plus 6 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: We are seeking a highly skilled and experienced Software Engineer to join our dynamic team focused on undersea sensor systems. In this role, you will be responsible for designing, developing, and implementing advanced algorithms and...
General Dynamics Mission Systems, Inc
Jun 01, 2026
Senior Advanced Test Engineer - Test Program Lead - $5,000 Sign On Bonus
General Dynamics Mission Systems, Inc Manassas, VA
Basic Qualifications Requires a Bachelor’s degree in Engineering, or a related Science, Technology or Mathematics field. Also requires 8+ years of job-related experience, or a Master's degree plus 6 years of job-related experience.     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 This position has a $5,000 sign on bonus.   The Test Program Lead serves as the technical and programmatic authority for all CWL and MTWS verification and validation activities. This role owns the end-to-end Test & Evaluation strategy, including test planning, readiness, customer engagement, and certification...
General Dynamics Mission Systems, Inc
Jun 01, 2026
Software Engineer (C++, Linux, bash scripting) - Active Secret clearance
General Dynamics Mission Systems, Inc Manassas, VA
Basic Qualifications Bachelor's degree in Software Engineering, or related Science, Technology, Engineering or Mathematics field, plus a minimum of 2 years of relevant experience; or Master's degree, plus 6 months relevant experience.   CLEARANCE REQUIREMENTS:   Department of Defense active 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. Candidate must be local to the area and able to work onsite.  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...
General Dynamics Mission Systems, Inc
Jun 01, 2026
Software Integration Engineer – Submarine Combat Systems
General Dynamics Mission Systems, Inc Manassas, VA
Basic Qualifications Requires a Bachelor’s degree in Computer Science/Computer Engineering/ Software Engineering, or a related Science, Engineering, Technology or Mathematics field. Also requires 2+ years of job-related experience, or a Master's degree and 6 months of job-related experience.  Must have Kubernetes or Linux.   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. Candidate must local to the area and able to work onsite.  Responsibilities for this Position Integration Engineer – Submarine Combat Systems Seeking an Integration Engineer to support the Common Infrastructure Services...
General Dynamics Mission Systems, Inc
Jun 01, 2026
Lead Engineer for Navy Undersea Warfare C2
General Dynamics Mission Systems, Inc Manassas, VA
Basic Qualifications Bachelor's degree in Systems Engineering, or a related Science, Engineering or Mathematics field, plus a minimum of 8 years of relevant experience; or Master's degree, plus a minimum of 6 years of relevant experience. Must have Navy Undersea Warfare C2 experience.   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 Responsibilities Apply systems engineering processes including requirements analysis, architecture design, interface definition, and verification and validation (V&V) in support of this C2 Navy network program. Design, deploy, and manage containerized...
General Dynamics Mission Systems, Inc
Jun 01, 2026
Chief Engineer – Undersea Acoustic Systems
General Dynamics Mission Systems, Inc Manassas, VA
Basic Qualifications Bachelor's degree in  mechanical, electrical, or systems engineering or a related technical field and at least 10 years of related leadership experience in development and delivery of undersea acoustic systems for military applications. Applicants with a master's degree and a minimum of 8 years of related leadership experience are also eligible.   Department of Defense (DoD) Secret security clearance is required at time of hire – active and transferable. Top Secret clearance and eligibility for access to Special Access Program Information (SAPI) and Sensitive Compartmented Information (SCI), including willingness to submit to a polygraph, are desirable. Due to the nature of work performed in our facilities, U.S. citizenship is required. Ability to travel is required.  Travel is estimated at 25% to 35%. Responsibilities for this Position General Dynamics Mission Systems (GDMS), a market leader and...
General Dynamics Mission Systems, Inc
Jun 01, 2026
Advanced Software Engineer (Microservice Development)
General Dynamics Mission Systems, Inc Manassas, VA
Basic Qualifications Bachelor's degree in Software Engineering, or related Science, Technology, Engineering or Mathematics field, plus a minimum of 5 years of relevant experience; or Master's degree, plus 3 years relevant experience.   CLEARANCE REQUIREMENTS: : Department of Defense Secret security clearance is preferred, but must be 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 We’re looking for an experienced Software Engineer to join our team and help modernize a submarine combat system using cutting-edge technologies. If you’re passionate about microservices and enjoy solving complex problems, this is the role for you! What...
General Dynamics Mission Systems, Inc
Jun 01, 2026
Advanced Test and Systems Engineer - PCS
General Dynamics Mission Systems, Inc Manassas, VA
Basic Qualifications Bachelor's degree in Engineering, or a related Science or Mathematics field, plus a minimum of 5 years of relevant work experience; or Master's degree, plus a minimum of 3 years of relevant experience.   CLEARANCE REQUIREMENTS: : Department of Defense Secret security clearance is preferred, but must be 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 Job Requisition: Test Engineer for the Payload Control System (PCS) Job Summary: The PCS Systems/Test Engineer will be responsible for requirements development, verification planning, and test execution for the Payload Control System (PCS), a critical component of...
General Dynamics Mission Systems, Inc
Jun 01, 2026
Cyber Security Engineer - RMF (Active Secret Clearance)
General Dynamics Mission Systems, Inc Manassas, VA
Basic Qualifications Bachelor's degree in Engineering, or a related Science or Mathematics field, 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 active Secret security clearance is required .  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.  Candidate must be local to the office and able to work onsite.  Responsibilities for this Position ROLE AND POSITION OBJECTIVES As a Cybersecurity Systems Engineer, you will own the end-to-end RMF lifecycle for Navy information systems — from categorization through authorization and continuous monitoring. You will be the primary technical authority for building,...
LMI
Jun 01, 2026
Database DevOps Engineer - Clearance Required
LMI Fort Belvoir, VA
Overview LMI is seeking a   Database DevOps Engineer to be part of a team that is designing and developing complex, cloud-based systems. This position requires an   Active Secret Clearance.   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. Leveraging our mission-ready technology and solutions, proven expertise in federal deployment, and strategic relationships, we enhance outcomes for the government, efficiently and effectively. With a focus on agility and collaboration, LMI serves the defense, space, healthcare, and energy sectors—helping agencies navigate complexity and outpace change. Headquartered in Tysons, Virginia, LMI is committed to delivering impactful results that strengthen missions and drive lasting value....
Lockheed Martin
May 29, 2026
Chief Engineer Director, Undersea Mission Systems
Lockheed Martin Manassas, VA
Description: WHO WE ARE Lockheed Martin is revolutionizing the undersea domain with decades of proven expertise and a relentless drive for innovation. We're pushing the boundaries of what's possible, delivering game-changing capability that transforms data into decisive battlefield advantage. Our advanced undersea systems provide unmatched superiority, enabling submariners to dominate the depths. With full-spectrum sustainment, we ensure complex systems remain always-ready, always-operative, and always-effective from initial deployment through future modernizations. As a trusted partner, Lockheed Martin guarantees undersea superiority, empowering our customers to outmaneuver, outthink, and outperform in the most challenging environments . THE WORK Reporting to the Vice President Chief Engineer for MIC2, the Chief Engineer Director for the $1.4B UMS portfolio that includes the execution of the UMS portfolio of programs. As the UMS Chief Engineer, the selected individual will...
Lockheed Martin
May 29, 2026
Integration & Test Engineer
Lockheed Martin Dahlgren, VA
Description: WHAT WE'RE DOING SSDS is a Combat Direction System that provides capability to defend against Anti-Ship Missile (ASCM) attacks for carrier and large deck Amphibious ships classes. The SSDS is a vital combat system that integrates various sensors, weapons, and command systems to provide sailors and marines with a holistic view of the battlefield, enabling them to respond rapidly and effectively to threats. This upgrade significantly increases the system's capabilities, ensuring the Navy maintains its combat edge in the face of evolving maritime dangers. THE WORK We are looking for a strong technical engineer to support integration & test efforts at the System Integration Lab in Wallops Island, VA. The successful candidate will have experience and knowledge of the SSDS system and engineering life cycle processes. Ability to debug and troubleshoot systems that include software and hardware components. Basic Qualifications: • Minimum of 1+ years of related...
Lockheed Martin
May 29, 2026
Software Engineer Sr
Lockheed Martin Herndon, VA
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's Paragon Program is seeking a talented level 3 Software Engineer with a TS/SCI clearance to work from either our King of Prussia, PA or Herndon, VA location(s) . This is an EARLY-MID CAREER (level 3) ROLE where candidates typically require 3+ years of experience and...
Lockheed Martin
May 29, 2026
Software Engineer Sr
Lockheed Martin Herndon, VA
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's Paragon Program is seeking a talented level 3 Software Engineer with a TS/SCI clearance to work from either our King of Prussia, PA or Herndon, VA location(s) . This is an EARLY-MID CAREER (level 3) ROLE where candidates typically require 3+ years of experience and...
General Dynamics Mission Systems, Inc
May 29, 2026
Linux Software Engineer - 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 2+ years of job-related experience, or a Master's degree and 6 months of job-related experience. Agile experience preferred,   CLEARANCE REQUIREMENTS: : Department of Defense requires an active 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 . Candidate must work onsite.  Responsibilities for this Position ROLE AND POSITION OBJECTIVES: As a Software Integration Engineer for the Multipurpose Interactive Trainer (MIT) team , you’ll be a member of a cross functional team responsible for delivering cutting edge...
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