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28 senior security engineer jobs found

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Lockheed Martin
May 29, 2026
Cyber Security Engineer Senior
Lockheed Martin Herndon, VA
Description: Responsible for applying an interdisciplinary, collaborative approach to plan, design, develop, validate and verify Cyber solutions across the lifecycle. Conduct cyber risk assessment activities including threat modeling, vulnerability analysis and analysis of mitigation solutions. Coordinates and addresses Supply Chain risk management concerns. Develop, evaluate and analyze design constrains, trade-offs and detailed system and security design as they pertain to the Cyber domain. Coordinate with Cyber and system architects and developers to provide oversight in the development of solutions. Conduct cybersecurity test and evaluation of hardware and/or software designs to verify and validate compliance with defined specifications and requirements. Employs cyber security processes, methods, techniques and tools and assure their consistent application. Implements appropriate Assessment and Authorization activities as required by customers. Basic Qualifications: -...
General Dynamics Mission Systems, Inc
Jun 14, 2026
CWL Deputy Chief Engineer (Sr Advanced Systems Engineer)
General Dynamics Mission Systems, Inc Manassas, 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 Secret security clearance is ontainable within a reasonable time from 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 Responsibilities Coordinates requirements development, hardware/software design, verification, and validation activities Manages technical deliverables and coordinates technical review boards to review decisions with broad program...
General Dynamics Mission Systems, Inc
Jun 14, 2026
Senior Software Engineer - Active Secret clearance - $5,000 Sign On Bonus
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 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 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. This position is fully on-site in Manassas, VA or Middletown, RI . Responsibilities for this Position This position has a $5,000 sign on bonus.    We are hiring an Advanced Software Engineer.  Help make the technologies, products and services that make a difference. That’s the...
General Dynamics Mission Systems, Inc
Jun 14, 2026
Information System Security Officer (ISSO)
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: 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 The Information Assurance Engineer supports the system security design effort, security requirements analysis, and security requirements flow down to the program element. The role involves executing security testing, developing security documentation, and participating in Assessment and Authorization (A&A)...
LMI
Jun 09, 2026
Information Systems Security Engineer (ISSE) - Navy - Norfolk
LMI Norfolk, VA
Overview Location: Norfolk, VA preferred. Tysons, VA, or Richmond, VA, allowed. Partial teleworking allowed.   Overview:   The Information Systems Security Engineer (ISSE) - Navy   will promote an integrated, team-oriented culture while delivering strong individual contribution while advocating through action, robust teaming,  coordination  and collaboration .   In this dynamic role, you will  leverage  your technical and cybersecurity subject matter  expertise  to provide strategic guidance and support to LMI clients throughout sales and engagement processes. This  Senior Consultant  level role will be expected to contribute critical thinking, spanning client support, securing planned architecture, troubleshooting, and working with customers to developing use cases and applications of LMI sensor technology. Your  contribution to  proposed cybersecurity responses will help drive implementation roadmaps and ensure alignment with...
Lockheed Martin
Jun 04, 2026
Senior DevSecOps Engineer
Lockheed Martin Manassas, VA
Description: Who we are Lockheed Martin is a global leader in aerospace, defense, and technology solutions. Our Manassas campus is a thriving center of engineering expertise, fostering a culture that encourages creativity, excellence, and the creation of exceptional products. Our team is made up of dedicated professionals who are passionate about pushing the boundaries of what's possible. What We’re Doing At Lockheed Martin, we're at the forefront of cutting-edge technology and innovation. Our campus in Manassas, Virginia is a hub for engineering excellence, where we tackle some of the world's most challenging engineering problems. We pride ourselves on our culture of creativity, excellence, and product innovation. The Work Lockheed Martin Rotary and Mission Systems is seeking a Senior DevSecOps Engineer in Manassas, VA. Who you are Key Responsibilities: • Participate in a cross‑functional team to evaluate a large, complex legacy code base, assess the current CI/CD...
General Dynamics Mission Systems, Inc
Jun 02, 2026
Senior Network and Cyber Systems Engineer
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 2 years of relevant experience; or Master's degree, plus 6 months 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 Senior Network and Cyber System Engineer on the MIT team, you will execute cybersecurity operations and network engineering tasks across secure environments. This is a dual-role position split evenly between cybersecurity engineering and network engineering. You will contribute to...
Lockheed Martin
May 27, 2026
Senior Staff Project Engineer
Lockheed Martin Arlington, VA
Description: Lockheed Martin Corporation seeks a Project Engineer, Senior Staff to lead cross-functional business initiatives to include Governance, Tracking & Closure of projects to directly support the enterprise-wide transformation agenda with a focus on U.S based solutions that consider impact to the non-US international audience. Support Enterprise Business and Digital Transformation efforts through implementation, strategy, and integration with existing systems to create a competitive advantage and drive the strategic objectives of the U.S based Executive Leadership Team. Coordinate integration initiatives to ensure new business capabilities are delivered on time, within budget, and aligned with broader business needs. Oversee risk mitigation, schedule synchronization, and resource availability as well as stakeholder alignment across multiple functions and geographically dispersed organizations. Function as the primary point of contact for VP level and U.S Based...
Lockheed Martin
May 27, 2026
Systems Engineering Sr
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 single day we use our 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. 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 are creating future-ready solutions, erasing boundaries, and forming partnerships across industries and around the world. We are advancing technology and the workforce to...
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...
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....
LMI
May 14, 2026
Senior Cloud Engineer - Clearance Desired
LMI Fort Belvoir, VA
Overview The Cloud Engineer will play a critical role in the successful modernization and implementation of a variety of cloud deployments for our US Army Client. This position requires a seasoned professional with deep technical expertise in cloud computing, specifically in designing scalable, secure, and resilient cloud solutions aligned with Army Standards. The Cloud Engineer will lead cloud architecture efforts, ensuring workloads are optimized for performance and future scalability within Army’s environments. The successful candidate will have a deep technical expertise in cloud deployments paired with deep subject matter expertise in how the US Army operates, builds and deploys software.    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...
LMI
May 14, 2026
Data Engineer (Vantage) - Clearance Required
LMI Arlington, VA
Overview LMI is seeking a Data Engineer to build the pipelines that power Army leadership decisions. You will transform raw data from authoritative Army sources into structured, actionable "Objects" within the Vantage (Palantir Foundry) environment.   Focus: Scaling data pipelines and ontology management within the Army Vantage/Advana ecosystem.   Active Secret clearance required .   Location: Hybrid; at least 3 days on client site in Crystal City VA or Aberdeen MD   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...
LMI
May 12, 2026
Senior Integration and MBSE Engineer
LMI Tysons, VA
Overview LMI is seeking a Senior Systems Engineer to serve as the design-to-implementation lead for system interfaces, pipeline engineering design, and detailed systems engineering specifications within the F-35 LogIT program. This role works from the architecture baseline and extends it into detailed technical designs for data ingestion, transformation, transport, validation, metadata, observability, and security controls across government and OEM integration points.​ The role is engineering-oriented and requires a senior contributor who can shape design decisions, contribute to model-based engineering, and provide detailed systems engineering depth across ERP, DLMS, and government integration activities.   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...
General Dynamics Mission Systems, Inc
Jun 14, 2026
Senior Quality Specialist - 2nd Shift
General Dynamics Mission Systems, Inc Marion, VA
Basic Qualifications Bachelor’s degree in a related specialized area or the equivalent is required plus a minimum of 2 years of relevant experience; or Master's degree. J-STD_001, 002, IPC 610, MIL-STD-883 certification may be required within 30 days of hire. 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 Imagine building your career by developing the solutions that support the mission of our nation’s service members, intelligence analysts and first responders. That’s the challenge that’s waiting for you at General Dynamics Mission Systems. Here you have the opportunity to redefine innovation and...
General Dynamics Mission Systems, Inc
Jun 14, 2026
Senior Contracts Manager - Maritime & Strategic Systems Business Area
General Dynamics Mission Systems, Inc Manassas, VA
Basic Qualifications Education Requirements:  Bachelor's degree or equivalent combination of education and relevant work experience is required plus a minimum of 10 years of relevant experience; or Master's degree degree plus a minimum of 8 years of relevant experience to meet managerial expectations.   Clearance Requirements:  Department of Defense Top 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 Join General Dynamics Mission Systems in the Progeny Systems Business Area within the Maritime & Strategic Systems line of business. As a Senior Contracts Manager, you'll lead a team of contract professionals, manage key customer...
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...
Lockheed Martin
Jun 02, 2026
Product Quality Engineer/ Automation Specialist (Clearance Rq'd)
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. THE WORK Lockheed Martin is seeking a talented level 3 Product Quality Engineer with a TS/SCI w/ Poly clearance to work from our Fort Belvoir, VA location . Lockheed Martin is seeking an Engineer for the Product...
General Dynamics Mission Systems, Inc
Jun 01, 2026
Senior Project Manager
General Dynamics Mission Systems, Inc Manassas, VA
Basic Qualifications Bachelor's degree or equivalent relevant experience, plus minimum 5 years of relevant experience; or Master's degree, plus minimum 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 General Dynamics Mission Systems has an immediate opening for a Senior Project Manager supporting a Senior Program Manager across multiple concurrent production programs. This position offers a direct opportunity to impact program execution, customer satisfaction, and business growth within a portfolio that supports critical national defense missions. The...
General Dynamics Mission Systems, Inc
May 28, 2026
Security Specialist
General Dynamics Mission Systems, Inc Marion, VA
Basic Qualifications Bachelor's degree in a related field or the equivalent combination of education and relevant work experience is required plus a minimum of 2 years of relevant experience; or Master's degree.   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 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...
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