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249 security clearance jobs found in Herndon, VA

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LMI
Jun 07, 2026
Policy and Security Cooperation Advisor - Clearance Required
LMI Arlington, VA
Overview LMI is seeking a skilled Policy and Security Cooperation (SC) Advisor at a customer site in the Washington, DC area. A successful candidate will demonstrate competency in project execution, leadership critical thinking, and relationship management, while upholding the highest standard of ethical behavior.   This position requires you to be at the Pentagon 3-4 days a week.   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...
LMI
Jul 30, 2026
FSO / Security Lead w/active Top Secret clearance
LMI Washington, DC
Overview 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, homeland, healthcare, and intelligence 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.   Responsibilities LMI is  seeking  a driven, results-oriented FSO / Security Lead to own all aspects of personnel,...
LMI
Sep 03, 2026
Full time
Cyber Security Strategic Lead / ISSM - w/active Top Secret clearance
LMI Washington, DC
Overview 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, homeland, healthcare, and intelligence 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.   Responsibilities LMI is seeking a skilled ISSM / RMF Lead to manage information systems security and Risk Management...
LMI
Aug 05, 2026
Cybersecurity Information System Security Engineer - Clearance Required
LMI Fort Belvoir, VA
Overview LMI is seeking a skilled Senior Cybersecurity Information Systems Security Engineer (ISSE) to support US Army  Capability Program Executive (CPE) Gound   office  at Ft. Belvoir, Virginia. The ISSE will drive efforts that support software and hardware cybersecurity Risk Management Framework (RMF) Authority to Operate (ATO).     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...
Lockheed Martin
Aug 08, 2026
Tier 2 Systems Admin Support
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. This role will support the Strata program based out of Herndon, VA. The Systems...
Lockheed Martin
Aug 07, 2026
Software Engineer Staff (TS/SCI)
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 GEOINT Collection neXt (GCX) Program is a 7-year contract awarded to Lockheed Martin,...
Lockheed Martin
Aug 05, 2026
Senior Quantum Compute Scientist
Lockheed Martin Herndon, VA
Description: We are seeking a Senior Quantum Compute Scientist to: * Perform research, analysis, design, and development of emerging technologies, techniques, and systems for data analytics and exploitation using quantum computing. * Lead the conception, modeling, simulation, implementation, and testing of quantum based algorithms and applications, driving them from idea through validated prototype. * Collaborate closely with AI/ML development teams to create performance modeling algorithms for quantum hardware and to leverage high performance compute clusters for testing and optimization of designs. * Produce high quality technical documentation, including reports, proposals, and presentation materials, and communicate results effectively to internal teammates, external customers, and industry partners. * Write proposals for new research and development contracts. Guide technical development projects, ensuring milestones are met while fostering strong, collaborative...
Lockheed Martin
Jul 13, 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,...
Lockheed Martin
Jul 07, 2026
Systems Administrator
Lockheed Martin Herndon, VA
Description: • Provide Domain/Systems Administrator Engineer of the Mission LAN, and oversee the maintenance, optimal function, and patching of the LAN’s operating system, and the GOTS, COTS, and custom software products running on it. • Perform system startup, shutdown, backups, and restores and maintain records of the Cartoon operating system upgrades/changes for reporting purposes. • Conduct virus scanning and firewall protection of the Mission LAN in compliance with the Sponsor’s ISSM • Provide Data Transfer Officer (DTO) services between UNCLASSIFIED and CLASSIFIED networks as needed by the Sponsor • Coordinate assistance from the Sponsor’s corporate resources when required, if encountering a problem that the Contractor team cannot solve • Ensure security compliance with the Sponsor’s ISSM for all components of the network • Perform other system administration duties as requested by the Sponsor. Basic Qualifications: • Minimum 3 years experience as a Systems Administrator •...
Lockheed Martin
Jul 02, 2026
Deputy Program 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...
Lockheed Martin
Jun 09, 2026
Linux CNO Software Engineer
Lockheed Martin Herndon, VA
Description: As a leader in defense technology cybersecurity. Lockheed Martin designs innovative, custom fit capabilities that strengthen both offensive and defensive cyber operations for customer missions. We are seeking Cyber Network Operations (CNO) Linux Developers who want to solve technical challenges and build tools used in real-world applications. Why the CNO Developer role at Lockheed Martin Space: Mission critical impact: Develop state-of-the-art tools and platforms that help our customers to gather intelligence, protect critical infrastructure and outpace evolving threats. Technical expertise: Apply your deep knowledge in traditional computing (Windows/Linux/MacOS), mobile technology (Android/iOS), wireless technology, IoT, ICS/SCADA, enterprise technologies, and special-purpose embedded and real-time systems. Innovation lab environment: Work closely with a collaborative, multidisciplinary team and have direct access to senior cyber strategy...
General Dynamics Mission Systems, Inc
Jun 09, 2026
Advanced Structural Mechanical Engineer
General Dynamics Mission Systems, Inc Herndon, VA
Basic Qualifications Bachelor's degree in Mechanical Engineering, or a related Science, Engineering 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 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 Structural-Mechanical Engineer for Intelligence Systems, you will be responsible for performing structural analysis using applicable material resources, methods, and standards; perform design and development of mechanical systems; and carry out other tasks as required...
Lockheed Martin
Jun 04, 2026
Systems Administrator
Lockheed Martin Herndon, VA
Description: • Provide Domain/Systems Administrator Engineer of the Mission LAN, and oversee the maintenance, optimal function, and patching of the LAN’s operating system, and the GOTS, COTS, and custom software products running on it. • Perform system startup, shutdown, backups, and restores and maintain records of the Cartoon operating system upgrades/changes for reporting purposes. • Conduct virus scanning and firewall protection of the Mission LAN in compliance with the Sponsor’s ISSM • Provide Data Transfer Officer (DTO) services between UNCLASSIFIED and CLASSIFIED networks as needed by the Sponsor • Coordinate assistance from the Sponsor’s corporate resources when required, if encountering a problem that the Contractor team cannot solve • Ensure security compliance with the Sponsor’s ISSM for all components of the network • Perform other system administration duties as requested by the Sponsor. Basic Qualifications: • Minimum 3 years experience as a Systems Administrator •...
Lockheed Martin
Jun 04, 2026
Windows CNO Software 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 is a pioneer, partner, innovator and builder. Our amazing people are on a mission to make a difference in the world and every day we use our unique skills and experiences to create, design and build solutions to some of the worlds’ hardest engineering problems. Our culture encourages employees to dream big, perform with excellence and create incredible products. We provide the resources, inspiration and focus and if you have the passion and courage to dream big, we want to build a better tomorrow with you. To promote the sharing of ideas, Lockheed Martin fosters a collaborative work environment that encourages differences and big-picture thinking. As a Windows Developer, you will have the opportunity to work on a variety of mission-critical programs developing specialized cyber tools, techniques and integrated effects. The work our team...
General Dynamics Mission Systems, Inc
Apr 21, 2026
Structural Mechanical Engineer
General Dynamics Mission Systems, Inc Herndon, VA
Basic Qualifications Requires a Bachelor’s degree in Mechanical Engineering, 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.     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 Structural-Mechanical Engineer for Intelligence Systems, you will be responsible for performing structural analysis using applicable material resources, methods, and standards; perform design and development of mechanical systems; and carry out other...
Lockheed Martin
Mar 19, 2026
Sr. AI Software Engineer
Lockheed Martin Herndon, VA
Description: By bringing together people that use their passion for purposeful innovation, 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 diverse 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. At Lockheed Martin, we place an emphasis on empowering our employees by fostering innovation, integrity, and exemplifying the epitome of corporate responsibility. Your Mission is Ours. The Lockheed Martin Space AI Talent Center is seeking a highly skilled Software Engineer to join a cross-functional team of experts in research, data science, software development, physics, and mathematics. As a key member of this team, you...
Lockheed Martin
Mar 10, 2026
AI/ML Machine Learning Engineer
Lockheed Martin Herndon, VA
Description: By bringing together people that use their passion for purposeful innovation, 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 diverse 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. At Lockheed Martin, we place an emphasis on empowering our employees by fostering innovation, integrity, and exemplifying the epitome of corporate responsibility. Your Mission is Ours. The Space AI Talent Center is seeking a highly skilled AI/ML Machine Learning Engineer to join a cross-functional team of experts in research, data science, software development, physics, and mathematics. As a key member of this team, you...
General Dynamics Mission Systems, Inc
Jun 09, 2026
Senior Level Contracts Specialist
General Dynamics Mission Systems, Inc Chantilly, VA
Basic Qualifications Education Requirements: Bachelor's degree or equivalent combination of education and relevant experience is required plus a minimum of 10 years of relevant experience; or Master's degree plus a minimum of 8 years of relevant experience.   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 Overview: This Senior Level Contracts Specialist is responsible for supporting the management of the company's contractual agreements with customers, in the drafting, negotiation, and execution of contracts, as well as ensuring compliance with contract terms and...
General Dynamics Mission Systems, Inc
Apr 29, 2026
Strategy and Business Development Manager
General Dynamics Mission Systems, Inc Chantilly, VA
Basic Qualifications Bachelor’s degree or equivalent is required plus a minimum of 10 years of relevant experience; or Master's degree plus a minimum of 8 years of relevant experience to meet managerial expectations. CLEARANCE REQUIREMENTS: Department of Defense TOP SECRET security clearance with SCI  required at time of hire. Applicants selected may be subject to further U.S. Government security investigations 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 General Dynamics Mission Systems is looking for a talented Strategy and Business Development Manager to support our Space, Cyber and Intelligence Systems line of business. The incumbent would be joining a top performing team and should possess a strong business acumen and desire to be forward leaning in identifying...
General Dynamics Mission Systems, Inc
Feb 12, 2026
AUKUS Strategy and BD Director
General Dynamics Mission Systems, Inc Chantilly, VA
Basic Qualifications Education:  Bachelor’s degree or equivalent is required plus a minimum of 15 years of demonstrated leadership; or Master's degree plus a minimum of 13 years of demonstrated leadership. years of demonstrated leadership; or Master's degree plus a minimum of 13 years of demonstrated leadership. 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. Responsibilities for this Position Duties and Tasks: Directs business development activities for AUKUS. Key business partner for strategy and growth with the Advanced Programs Vice President, as well as the Unmanned and Future Combatants and...
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