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489 security clearance jobs found in Littleton, CO

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Lockheed Martin
Jul 02, 2026
Systems Engineer Sr - System Safety Engineer
Lockheed Martin Littleton, CO
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 men and women 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. Lockheed Martin Space has an immediate opportunity for a mid-career System Safety Engineer at our Denver, CO. facility. If you have an interest in working for a company that develops national defense systems, come and be a part of our System Safety Team. At Lockheed Martin Space, we are driven by innovation and integrity. We believe...
Lockheed Martin
Jul 02, 2026
COMSEC CRO Associate Leader
Lockheed Martin Littleton, CO
Description: This position requires current Top Secret clearance with ability to obtain SCI eligibility. Lockheed Martin is seeking a Computer Systems Security Associate Leader to oversee all COMSEC activities for a geographic/functional region in support of critical program needs. This role ensures the protection of classified information in support of National Security programs as well as enables reliable and trusted communications over commercial networks. Responsibilities include: – Direct all COMSEC activities for a geographic/functional region, coordinating with local command structures and executing approved COMSEC plans while adapting to local operational constraints. - Provide daily guidance to COMSEC Account Managers and Alternates, create personnel assignments, and verify completion of required training and documentation. – Conduct and oversee spot‑checks/inspections to ensure proper material handling, safe‑combination security, and full compliance with all...
Lockheed Martin
Jul 02, 2026
IPT Lead/CAM V, Pressure Transducers
Lockheed Martin Littleton, CO
Description: Join Our Team as a Project Engineer where you will work on the development of a sophisticated state-of-the-art avionics product in a world class Integrated Product Development environment. Location: This position does not support teleworking ;the selected candidate will be located near our Lockheed Martin Space facility in: Littleton CO and be expected to work in the office full-time. 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...
Lockheed Martin
Jul 02, 2026
System Engineer Associate - Entry Level
Lockheed Martin Littleton, CO
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. For over 70 years, the Fleet Ballistic Missile (FBM) team has supported the Navy’s...
Lockheed Martin
Jul 02, 2026
ElectroMechanical Harness Lead, Asc Manager
Lockheed Martin Littleton, CO
Description: The Fleet Ballistic Missile Avionics team is seeking an experienced Electromechanical Harness Engineer who will lead a team of engineers in the development of 3D concept models of space flight avionics Cable and Harnessing and ultimately advance them for flight use. Location: This position does not support teleworking ; you will be located near our Lockheed Martin Space facility in: Littleton or Englewood CO and be expected to work a flexible 9x80 schedule in the office full-time. What does this role look like? • Lead trade studies on cable and harness design approaches and provide technical data for informal and formal design review documentation and presentations. • Provide leadership on a fast paced team from requirements through development and production. • Be responsible to assure coordination between functional groups during the product development life cycle. • Communicate technical status and issues internally to program leadership, technical...
Lockheed Martin
Jul 02, 2026
Systems Engineer - Mechanical Integration
Lockheed Martin Littleton, CO
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. "Ahead of Ready" At Lockheed Martin, we are shaping the future of space exploration...
Lockheed Martin
Jul 02, 2026
Packaging Engineer
Lockheed Martin Littleton, CO
Description: Designs, develops, and tests a wide variety of containers used for the protection, display, and handling of products. Determines packaging specifications according to the nature of the product, cost limitations, legal requirements, and the type of protection required, considering need for resistance to such external variables as moisture, corrosive chemicals, temperature variations, light, heat, rough handling, and tampering. Designs package exteriors considering such factors as product identification, sales appeal, aesthetic quality, printing and production techniques. Basic Qualifications: US citizenship Demonstrated proficiency in MS Office products Demonstrated application of Mechanical Engineering principals Demonstrated proficiency with Creo Parametric Desired Skills: Related experience with packaging standards, methodology and best practices Demonstrated clear written and verbal communication skills Related experience with packaging and shipment of...
Lockheed Martin
Jul 02, 2026
Materials and Contamination Control Engineer, Senior (Level III)
Lockheed Martin Littleton, CO
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. When you join Space Protection Programs (SPP) you will be part of one of the most...
Lockheed Martin
Jul 02, 2026
Software Integration/Test Engineer
Lockheed Martin Littleton, CO
Description: As a Software Integration/Test Engineer for Assembly Test Launch Operations (ATLO) Test Labs and Services, you will: • Provide Operations & Maintenance (O&M) Software support to include rebuilding machines, patching, debugging, and reconfiguring existing Automated Test Systems. • Testing new software developed by the larger team as an independent reviewer and tester. • Author Acceptance Test Procedures (ATPs), Engineering Functional Checkout Procedures (EFCPs), and Standard Operating Procedures (SOPs) for deployed software. • Collaborate with Systems, mechanical, electrical, software, and test engineers across labs and programs to develop, test, and validate new system capabilities to ensure a complete working solution. • Develop 3D CAD models and 2D drawings as part of integrated design solutions • Assist technicians during system assembly, checkout, and validation and lead troubleshooting efforts. • Must be interested and have experience working with...
Lockheed Martin
Jul 02, 2026
COMSEC Associate Leader
Lockheed Martin Littleton, CO
Description: This position requires Top Secret clearance. Lockheed Martin is seeking a Computer Systems Security Associate Leader to oversee all COMSEC activities for a geographic/functional region in support of critical program needs. This role ensures the protection of classified information in support of National Security programs as well as enables reliable and trusted communications over commercial networks. Responsibilities include: – Direct all COMSEC activities for a geographic/functional region, coordinating with local command structures and executing approved COMSEC plans while adapting to local operational constraints. - Provide daily guidance to COMSEC Account Managers and Alternates, create personnel assignments, and verify completion of required training and documentation. – Conduct and oversee spot‑checks/inspections to ensure proper material handling, safe‑combination security, and full compliance with all applicable NSA and customer requirements. – Maintain...
Lockheed Martin
Jul 02, 2026
Program Management Manager
Lockheed Martin Littleton, CO
Description: We are seeking a highly skilled and motivated Program Manager (PM) to join the Accelerated Mission Demonstrations (AMD) team within IGNITE. This role will initially be responsible for the Radar Pathfinder (RPF) program within AMD’s on-orbit demo mission portfolio. Radar Pathfinder is an LM400-class remote sensing demonstration mission, funded primarily with Independent Research and Development (IRAD) to advance LM Space’s strategic offering in key mission areas by demonstrating salient bus and payload capabilities. RPF is currently in the Space Vehicle Assembly, Integration, and Test (AI&T) phase, with launch and operations to come. This position is responsible for all aspects of the program throughout the entire program life cycle. Accelerated Mission Demonstrations is a directorate within LM Space’s IGNITE organization that includes a portfolio of on-orbit demonstration missions. AMD partners with the lines of business (LOBs) and strategy and business...
Lockheed Martin
Jul 02, 2026
Electromagnetic Compatibility Engineer
Lockheed Martin Littleton, CO
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. As a Systems Engineer, Electromagnetic Compatibility (EMC/E3) , you will: • Work in a...
Lockheed Martin
Jul 02, 2026
Subcontract Program Manager, Staff
Lockheed Martin Littleton, CO
Description: The mission matters. So do the people behind it. With advancing defense technology at our core, what sets us apart is a culture of collaboration, purpose, and impact. What is the mission? 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. ✪ Who we are: We are a dynamic team at the cutting edge of National Security Space dedicated to developing innovative technologies that address the most unique and pressing customer challenges. Our collaborative culture fosters creativity, teamwork, and the pursuit of excellence for our programs and our suppliers. ✪ Why join us: This is an opportunity to be at the forefront of managing critical partnerships for key discriminating deliverables that drive the success of a quickly growing...
Lockheed Martin
Jul 02, 2026
Sr. Staff Chief Engineer
Lockheed Martin Littleton, CO
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. As a member of the Transport, Tracking & Warning (TTW) SDA Portfolio Chief...
Lockheed Martin
Jul 02, 2026
Systems Engineer - Clearance Required
Lockheed Martin Littleton, CO
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 The Lockheed Martin MOATS program is seeking a talented level 2 Systems Engineer with an active Top Secret security clearance to work from our Littleton, CO location. The MOATS contract includes sustainment and anomaly support to ongoing Space related operations, obsolescence and...
Lockheed Martin
Jul 02, 2026
Systems Integration and Test Engineer Senior
Lockheed Martin Littleton, CO
Description: Lockheed Martin is seeking an experienced Senior Systems Integration & Test Engineer to join the Conventional Prompt Strike (CPS) Platform Integration Integrated Product Team (IPT) focused on CPS installation on US Navy destroyers and submarines. In this role you will be involved in the system of systems integration of CPS weapon system onto the US Navy platforms, with an emphasis on the electrical integration architecture and design. You will be involved in development, integration, and test of the CPS weapon system electrical interfaces. You will work with engineers across the program to ensure success within critical deployment schedules. In this role you will be expected to identify areas of technical concern, engage teammates to develop key solutions, and support implementation of the solutions. This role gives you an opportunity for involvement in weapon system development across the program lifecycle: influencing requirements for new technology...
Lockheed Martin
Jul 02, 2026
Space Vehicle Electrical Test Engineer Sr - CLEARANCE REQUIRED
Lockheed Martin Littleton, CO
Description: Must have an Active Top Secret w/ Poly clearance The coolest jobs on this planet… or any other… are with Lockheed Martin Space. 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. Do you want to join a team where employees envision the impossible, perform with excellence and build incredible products? What are Space Protection Programs (SPP)? When you join SPP you will be part of one of the most innovative and fastest moving organizations in Space. Come help build end-to-end Space Security Systems and utilize our cutting-edge capabilities to assure the security and health of our nation’s space assets. We push the boundary of what gets done in space. Come be one of the people playing a critical role to defeat the enemies of freedom. We are...
Lockheed Martin
Jul 02, 2026
Space Vehicle Electrical Test Engineer - CLEARANCE REQUIRED
Lockheed Martin Littleton, CO
Description: Must have an Active Top Secret clearance with ability to obtain TS/SCI w/ Poly. The coolest jobs on this planet… or any other… are with Lockheed Martin Space. 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. Do you want to join a team where employees envision the impossible, perform with excellence and build incredible products? What are Space Protection Programs (SPP)? When you join SPP you will be part of one of the most innovative and fastest moving organizations in Space. Come help build end-to-end Space Security Systems and utilize our cutting-edge capabilities to assure the security and health of our nation’s space assets. We push the boundary of what gets done in space. Come be one of the people playing a critical role to defeat the...
Lockheed Martin
Jul 02, 2026
Production Planning Associate Manager - Level 4
Lockheed Martin Littleton, CO
Description: Protecting what matters most is the mission that matters most. 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. Our facility in...
Lockheed Martin
Jul 02, 2026
System Integration Test Engineer Stf - Mechanism/Environmental
Lockheed Martin Littleton, CO
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. Every day, our 115,000 employees come to work with one focus – our customers’ missions. Our customers tackle the hardest missions. Those that demand extraordinary amounts of courage, resilience, and precision. They’re dangerous. Critical. Sometimes they even provide an opportunity to change the world and save lives. Those are...
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