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42 information system security engineer jobs found

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Lockheed Martin
Apr 21, 2026
Information System Security Officer, Classified Cybersecurity
Lockheed Martin Herndon, VA
Description: This position requires TS/SCI clearance with the ability to obtain a CI polygraph. This position will perform duties as an Information Systems Security Officer at the Lockheed Martin Space facility in Herndon, Virginia. Candidates will typically have a Bachelor's Degree and 1+ years of experience. The work that ISSOs do can be summarized in this way: - You will have a direct impact to national security, ultimately contributing to protecting your loved ones – this is dynamic, gratifying and impactful work! - You will have the opportunity to engage in all aspects of the cyber discipline. - You can enjoy a work-life balance that allows for flex hours and a family-first culture. Key Responsibilities of this role includes: - Support day-to-day information system security operations including hardware and software implementations. - Carry out technical security administration of IS in accordance with internal LM and customer cybersecurity requirements, primarily the...
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
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
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,...
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...
Lockheed Martin
May 23, 2026
Aegis Weapon System (AWS) Ballistic Missile Defense Technical Trainer
Lockheed Martin King George, VA
Description: What We’re Doing At Lockheed Martin Rotary and Mission Systems, we're on a mission to drive innovation and uphold the highest standards of business ethics. We believe that by pushing the boundaries of visionary thinking, we can achieve exceptional results. As a Lockheed Martin employee, you'll have the opportunity to make a meaningful impact while working in an environment that values integrity and excellence. The Work This candidate will be part of a multi-instructor workforce for Aegis Foreign Military Sales (FMS) training serving our international customers. The candidate will be part of a shipboard and schoolhouse training cadre as an Aegis Weapon System (AWS) Ballistic Missile Defense (BMD) technician and operator Subject Matter Expert (SME). In addition to providing training, the candidate will be responsible for: - Assist in the development of new training materials, revise existing curricula, and support simulation virtual courseware updates and...
Lockheed Martin
May 23, 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. 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 level 3 Software Engineer with an active TS/SCI...
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
May 23, 2026
Agile Software Development Manager
Lockheed Martin Herndon, VA
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. The Strata program’s GEOINT Visualization Services (GVS) system has been delivering...
General Dynamics Mission Systems, Inc
May 18, 2026
CWL Experienced Systems Engineer
General Dynamics Mission Systems, Inc Manassas, VA
Basic Qualifications Requires a Bachelor’s degree in Electrical Engineering or Computer Engineering, or a related Science, Engineering or Mathematics field. Also requires 2+ years of job-related experience or a Master's degree. Agile experience preferred.     CLEARANCE REQUIREMENTS: Department of Defense Secret security clearance is required within a reasonable period. 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 for CWL, you’ll be a member of a cross functional team responsible for the system engineering and functional design of the system under development, addressing topics such as payload integration, weapon launch interlocks,...
LMI
May 16, 2026
Cyber Engineer - TS/SCI with Polygraph Required
LMI McLean, VA
Overview We’re looking for a Cyber Engineer to help deploy, extend, and integrate LIGER, an enterprise AI platform that connects knowledge, systems, and agentic workflows to accelerate outcomes across federal missions. You’ll join a small, cross-functional team working directly with customers to get LIGER into production and build the features that make it stick.    Join our cutting-edge generative AI (GenAI) platform, LIGER™ , created by its technology studio, LMI  Forge . LIGER™ harnesses the power of advanced technology, data analytics, and the latest in machine learning and natural language processing to provide secure, private, and trustworthy GenAI solutions for government.   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....
Lockheed Martin
May 08, 2026
Systems Engineer IT Sr
Lockheed Martin Fort Belvoir, 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. 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 Level 3 Systems Engineer-IT with a TS/SCI w/ Poly...
Lockheed Martin
May 07, 2026
AEGIS / SPY MSSP Systems Technician
Lockheed Martin Norfolk, VA
Description: WHAT WE'RE DOING At Lockheed Martin Rotary and Mission Systems, we are inspired by innovation and integrity. We believe that by applying the highest standards of business ethics and creative 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! THE WORK The engineer shall provide on-site field engineering and technical support services in support of PEO IWS 1FR Aegis Fleet Readiness waterfront efforts. The engineer will perform: • Shipboard fleet technical services for the AN/SPY-1 Radar transmitter, antenna and MMSP as well as associated support systems to include: o Engineering / technical evaluations o Assessments o Equipment functional checks o Technical assists o Troubleshooting, analysis and equipment repair o Leverage preventive and corrective maintenance as training opportunities to develop and enhance US Navy sailor technical...
Lockheed Martin
May 01, 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 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 a BS...
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