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11 senior security engineer jobs found

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Security Clearance senior security engineer Virginia
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LMI
Oct 16, 2026
Senior Security & Compliance Engineer
LMI Arlington, VA
Overview LMI is seeking a Staff Security & Compliance Engineer to secure a common platform for onboarding, deploying, and hosting third-party applications in support of HQDA G-4. This engineer will support the platform’s authorization, maintain its security controls, and assess whether applications meet prescribed controls and hosting standards before deployment and during operations.   This is a hands-on role for an engineer who can turn security requirements into automated checks, clear findings, and actionable evidence for government decisions.   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...
LMI
Oct 16, 2026
Senior Software Engineer
LMI Arlington, VA
Overview LMI is seeking a Senior Software Engineer to build user-facing applications supporting HQDA G-4. This engineer will own application capabilities from user need through production delivery as containerized applications deployed to a Kubernetes cluster.   This is a hands-on role for an engineer who can work across the stack, make architectural decisions, and build software directly with Army users and product teams.   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,...
LMI
Oct 15, 2026
Staff Data Engineer - Clearance Required
LMI Arlington, VA
Overview LMI is seeking a Staff Data Engineer to build authoritative data products supporting Army logistics operations. This engineer will own the development and sustainment of data pipelines, models, and ontology within Palantir Foundry. This is a senior individual-contributor role for an engineer who can make architectural decisions, build production systems, and raise the technical standard of the team.   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,...
LMI
Oct 09, 2026
Full time
Forward Deployed Engineer - Clearance Required
LMI Arlington, VA
Overview We are seeking a Senior Forward Deployed Engineer to embed directly with mission users and own the technical solution from mission need through production deployment. This is a hands-on role for an engineer who enjoys solving hard, ambiguous problems—and wants to see the technology they build make a difference in the real world. You will work alongside mission users to understand what is actually happening on the ground, identify opportunities where technology can make a meaningful difference, and turn those insights into working solutions. You’ll integrate advanced technologies—including modern AI/LLM capabilities—into operational workflows, build and deploy new software capabilities, and iterate directly with users until the solution delivers measurable mission impact. This is not a role where you simply receive requirements and hand off code. You will be close to the problem, close to the user, and accountable for the outcome. You’ll have the...
LMI
Oct 09, 2026
Full time
Data Engineer, Mission Data Products - Clearance Required
LMI Fort Belvoir, VA
Overview LMI is seeking a Staff Data Engineer to build authoritative data products supporting Army acquisition and program operations. This engineer will own data pipelines, models, and ontology within Army Vantage or Palantir Foundry.   This is a senior individual-contributor role for an engineer who can make architectural decisions, build production systems, and raise the technical standard of the team.   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,...
LMI
Oct 06, 2026
Full time
Data Engineer, Mission Data Products - Clearance Required
LMI Fort Belvoir, VA
Overview LMI is seeking a Staff Data Engineer to build authoritative data products supporting Army acquisition and program operations. This engineer will own data pipelines, models, and ontology within Army Vantage or Palantir Foundry.   This is a senior individual-contributor role for an engineer who can make architectural decisions, build production systems, and raise the technical standard of the team.   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,...
LMI
Jul 01, 2026
Senior Data Scientist (Clearance Required)
LMI Tysons, VA
Overview LMI is seeking a Senior Data Scientist to build and deploy machine learning capabilities for a U.S. Army customer. You will move models from concept to production on LMI platforms, working alongside engineers, operators, and mission users to support Army analysis and decision-making. You will be responsible for the full scope of the work, from data preparation through models deployed and used in the customer’s environment. This is a hybrid position based in Washington, DC, with regular time on client site and occasional travel to LMI HQ in Tysons, VA. This position requires an active Secret clearance, for which you must be a U.S. citizen. 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...
General Dynamics Mission Systems, Inc
Jun 15, 2026
Senior Network Cyber 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...
LMI
Sep 30, 2026
Full time
Senior Data Scientist - Clearance Required
LMI Tysons, VA
Overview The Data Scientist – SME will serve as the lead technical expert for optimization and advanced analytics within the portfolio. This role will own the design and implementation of prescriptive analytics solutions—especially optimization models—that set safety stock levels, recommend resupply quantities, and balance risk and cost across the supply chain. The SME will work closely with logisticians, ammunition SMEs, and data engineers to operationalize prescriptive decision support tools in Army Vantage and related environments. 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...
General Dynamics Mission Systems, Inc
Jun 17, 2026
Senior Principal Contracts Specialist
General Dynamics Mission Systems, Inc Marion, VA
Basic Qualifications 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: A 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 conditions. The Contracts Specialist also...
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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