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Ashburn, Virginia

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Today

U.S. Citizenship Required. This position requires a current SECRET or TOP SECRET clearance. Candidate must be SAP and SCI program eligible. The position is in-person and not remote. Toyon is seeking a Mechanical Engineer to support a critical infrastructure protection program. In this role, you will work closely with Toyon's engineering team and client stakeholders, supporting the analysis and design of specialized air handling units, development of drawings and specifications, and troubleshoo

Full-time

USD 125,000.00 - 165,000.00 per year

Mechanical Engineer

Reston, Virginia

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Today

Mechanical Engineer (TS/SCI Required) Location: Reston, VA Leidos is seeking a talented Mechanical Engineer to support critical national security missions in Reston, Virginia. This role focuses on the assessment, reverse engineering, and characterization of complex above-ground and subterranean facilities located in denied-access environments. The successful candidate will apply mechanical engineering expertise to analyze facility designs, spatial layouts, operational workflows, and supportin

Full-time

USD 87,100.00 - 157,450.00 per year

Mechanical Engineer

Herndon, Virginia

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Today

Job Title Mechanical Engineer Location Herndon, VA - Herndon, VA 20171 US (Primary) Job Description Fibertek is a leading developer of laser and electro-optic systems for the aerospace community, with key contributions to lasers for atmospheric sensing, laser communications, and lidar sensors for NASA, DoD, and commercial customers. We are looking for a highly motivated individual to join our Mechanical Engineering Department onsite in Herndon, VA. As part of the Mechanical Engineering proj

Full-time

Mechanical Engineer

Chantilly, Virginia

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Today

Looking for an opportunity to make an impact? At Leidos, we deliver innovative solutions through the efforts of our diverse and talented people who are dedicated to our customers' success. We empower our teams, contribute to our communities, and operate sustainable. Everything we do is built on a commitment to do the right thing for our customers, our people, and our community. Our Mission, Vision, and Values guide the way we do business. If this sounds like the kind of environment where you can

Full-time

USD 131,300.00 - 237,350.00 per year

Senior Mechanical Engineer

Herndon, Virginia

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Today

Job Title Senior Mechanical Engineer Location Herndon, VA - Herndon, VA 20171 US (Primary) Job Description As a Sr. Mechanical Engineer, you will design and develop complex laser and electro-optical systems for military and/or aerospace applications. Duties include project team technical leadership from project inception through delivery. The responsibilities require full knowledge of military/aerospace design cycles and general design requirements and development of robust design solutions

Full-time

Senior Mechanical Engineer

Fairfax, Virginia

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Today

At Whitman, Requardt & Associates, LLP, we are "People Focused and Project Driven". We have been in business for more than 110 years and we are known for our quality work and developing quality employee careers. We are seeking the very best and most talented to join our team - help us take on challenges, develop vision solutions, and innovate and design the infrastructure of the future that will transform the world! Whitman, Requardt & Associates, LLP (WRA) is a leading multidisciplinary engine

Full-time

Junior Mechanical Engineer

Reston, Virginia

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Today

Mechanical Engineer (TS/SCI Required) Leidos is seeking a motivated Mechanical Engineer to support critical national security missions in Reston, Virginia. This role focuses on the assessment, reverse engineering, and characterization of complex above-ground and subterranean facilities located in denied-access environments. The successful candidate will apply mechanical engineering principles to analyze facility designs, spatial layouts, operational workflows, and supporting infrastructure to

Full-time

USD 69,550.00 - 125,725.00 per year

Mechanical Engineer III

Chantilly, Virginia

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Today

For more than 50 years, ENSCO has been providing leading-edge engineering, science and advanced technology solutions to governments and private industries worldwide. ENSCO prides itself in creating and applying advanced technologies for mission success. We provide systems engineering, integration, and advanced technology services to transform the future safety, security, and resiliency of critical missions on the ground, in the air, in space, and in the information systems that connect these do

Full-time

USD 102,086.40 - 131,331.20 per year

Senior Mechanical Engineer

Reston, Virginia

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Today

Leidos is seeking an experienced Senior Mechanical Engineer to support critical national security missions in Reston, Virginia. This role focuses on the assessment, reverse engineering, and characterization of complex above-ground and subterranean facilities located in denied-access environments. The successful candidate will leverage strong engineering expertise to analyze facility designs, spatial layouts, operational workflows, and supporting infrastructure to determine functional capabiliti

Full-time

USD 131,300.00 - 237,350.00 per year

Spacecraft Mechanical Engineer

Reston, Virginia

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Today

Umbra is an American space technology company delivering advanced systems, from sensors to spacecraft, that empower customers worldwide with unmatched access to critical information from space. Our mission is simple and ambitious: redefine space-for people, systems, and missions in every domain. Umbra's ecosystem operates through three business units: Remote Sensing (the data), Space Systems (the components), and Mission Solutions (the platforms). Together, our teams develop capabilities that de

Full-time

USD 135,000.00 - 175,000.00 per year

Mechanical Engineer II

Sterling, Virginia

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Today

Join Axon and be a Force for Good. At Axon, we're on a mission to Protect Life. We're explorers, pursuing society's most critical safety and justice issues with our ecosystem of devices and cloud software. Like our products, we work better together. We connect with candor and care, seeking out diverse perspectives from our customers, communities and each other. Life at Axon is fast-paced, challenging and meaningful. Here, you'll take ownership and drive real change. Constantly grow as you work

Full-time

Mechanical Engineer - Mid Level

Fairfax, Virginia

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Today

At Whitman, Requardt & Associates, LLP, we are "People Focused and Project Driven". We have been in business for more than 110 years and we are known for our quality work and quality employees. This is your chance to join our team - help us to design the infrastructure and buildings that improve the world! We are currently seeking an experienced Mechanical Engineer to join our Building Design Group in our Fairfax, VA office. As a Mechanical Project Engineer, you will be a key player in completi

Full-time

Telescope Opto-Mechanical Engineer

Chantilly, Virginia

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Today

Job ID: 2613750 Location: Chantilly, VA, US Date Posted: 2026-06-16 Category: Engineering and Sciences Subcategory: Systems Engineer Schedule: Full-Time Shift: Day Job Travel: Yes - 25% of the time Minimum Clearance Required: TS.SCI_wPoly Clearance Level Must Be Able to Obtain: None Potential for Remote Work: ORA_ON_SITE Description SAIC is looking for a Telescope Opto-mechanical Engineer with Space Domain Operations experience in Chantilly, VA to support a very dynamic and innovative

Full-time

Senior Specialist, Mechanical Engineer

Sterling, Virginia

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Today

L3Harris is dedicated to recruiting and developing high-performing talent who are passionate about what they do. Our employees are unified in a shared dedication to our customers' mission and quest for professional growth. L3Harris provides an inclusive, engaging environment designed to empower employees and promote work-life success. Fundamental to our culture is an unwavering focus on values, dedication to our communities, and commitment to excellence in everything we do. L3Harris is the Trus

Full-time

Principal Mechanical Engineer SME

Reston, Virginia

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Today

Principal Mechanical Engineer (TS/SCI Required) Location: Reston, VA Leidos is seeking an experienced Principal Mechanical Engineer to support high-priority national security missions in Reston, Virginia. This role focuses on the assessment, reverse engineering, and characterization of complex above-ground and subterranean facilities located in denied-access environments. The successful candidate will leverage extensive engineering expertise to analyze facility designs, spatial layouts, opera

Full-time

USD 154,050.00 - 278,475.00 per year

Advanced Structural Mechanical Engineer

Herndon, Virginia

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Today

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.

Full-time

USD 136,837.00 - 144,320.00 per year

Mechanical Engineer, Senior

McLean, Virginia

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Today

Overview AMERICAN SYSTEMS is an employee-owned federal government contractor supporting national priority programs through our strategic solutions in the areas of Information Technology, Test & Evaluation, Program Mission Support, Engineering & Analysis, and Training. Responsibilities Responsible for providing guidance and expertise in mechanical engineering to design complex mechanical equipment and systems, and to investigate, evaluate and develop new applications for existing equipment and

Full-time

USD 125,000.00 per year

Mechanical Engineer

Arlington, Virginia

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Today

Job Summary Chloeta is hiring an Mechanical Engineer to provide professional engineering services in support of federal facilities and infrastructure projects. This role supports a wide range of architectural and engineering (A/E) services, including planning, design, construction administration, inspection, and technical analysis for new construction, renovations, and modernization of Federal facilities. The Mechanical Engineer works as part of a multidisciplinary team to deliver compliant, eff

Full-time

Mechanical Engineer

Arlington, Virginia

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Today

Leidos currently has an opening for a Thermal/Mechanical Design Engineer to work in our Arlington, Virginia office. This is a highly dynamic and integrative environment in which talented and creative engineers can thrive working on a diverse array of multidisciplinary projects in its Electronic Warfare Division. We are seeking a broadly trained and highly motivated engineer with a strong thermal engineering background to support advanced technology programs from research and development through

Full-time

USD 87,100.00 - 157,450.00 per year

Space Special Projects, Mechanical Engineer

Reston, Virginia

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Today

Anduril Industries is a defense technology company with a mission to transform U.S. and allied military capabilities with advanced technology. By bringing the expertise, technology, and business model of the 21st century's most innovative companies to the defense industry, Anduril is changing how military systems are designed, built and sold. Anduril's family of systems is powered by Lattice OS, an AI-powered operating system that turns thousands of data streams into a realtime, 3D command and c

Full-time

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