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Manassas, Virginia

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Today

Mechanical Engineer Gromelski and Associates, Inc. (GAI) partners with prime contractors to provide professional services. Key service areas include Engineering Design and Documentation; Software Development and Testing; System Integration, Testing and Evaluation; Lab Management and Field Installation; Integrated Logistics Support, Training Development and Delivery, Multimedia Support, and Technical System Support. Mechanical Engineer Job Description: Research, plan, design, and develops mech

Full-time

USD 95,000.00 - 140,000.00 per year

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

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

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

Mechanical Engineer

Lorton, Virginia

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Today

Company Overview We are a world-class team of professionals who deliver next generation technology and products in robotic and autonomous platforms, ground, soldier, and maritime systems in 50+ locations world-wide. Much of our work contributes to innovative research in the fields of sensor science, signal processing, data fusion, artificial intelligence (AI), machine learning (ML), and augmented reality (AR). QinetiQ US's dedicated experts in defense, aerospace, security, and related fields a

Full-time

USD 91,350.00 - 116,900.00 per year

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

USD 160,001.00 - 200,000.00 per year

Telescope Opto-Mechanical Engineer

Chantilly, Virginia

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Today

Overview Systems Planning and Analysis, Inc. (SPA) delivers high-impact, technical solutions to complex national security issues. With over 50 years of business expertise and consistent growth, we are known for continuous innovation for our government customers, in both the US and abroad. Our exceptionally talented team is highly collaborative in spirit and practice, producing Results that Matter. Come work with the best! We offer opportunity, unique challenges, and clear-sighted commitment to

Full-time

USD 150,000.00 - 195,000.00 per year

Mechanical Engineer

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 - 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

UAV/Advanced Mechanical Engineer

Manassas, Virginia

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Today

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 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 req

Full-time

USD 124,216.00 - 137,803.00 per year

Mechanical Engineer

Falls Church, Virginia

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Today

At Aret, we are on the forefront of utilizing innovative solutions, with great minds from all backgrounds, to help solve the nation's most complex security challenges. We strive for an inclusive, collaborative team environment that approaches differences as opportunities for innovation and excellence. As an employee-owned company, we foster an atmosphere that propels diverse career opportunities and professional growth. Discover your future with us. Our Falls Church, VA office has an immediate

Full-time

USD 84,000.00 - 115,000.00 per year

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

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 I

Fort Belvoir, Virginia

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Today

Full-time

USD 70,000.00 - 90,000.00 per year

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

Washington, District of Columbia

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Today

Job Description Your Opportunity Our Buildings team is looking for a Project Mechanical Engineer with a focus in HVAC design. You will work with direct supervision and general direction on tasks and smaller projects, and as a team member of larger projects under the guidance of a Senior Engineer/Designer. You will assist in evaluating, selecting, specifying, and engineering certain Heating, Ventilating, and Air Conditioning (HVAC) building systems for a project verifying compliance with applic

Full-time

USD 107,300.00 - 155,500.00 per year

Mechanical Engineer

Washington, District of Columbia

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Today

Stantec's Buildings team is on a mission to become the world's leading integrated design practice. Our architects, engineers, interior designers, consultants, sustainability specialists, and technologists are passionate about the power of design. Our collaborative culture and our innovative, sustainable approach to projects help us create buildings that matter to our world. Together, we are enhancing the quality of life globally through design. Join us and design your place with Stantec. Your Op

Full-time

USD 107,300.00 - 155,500.00 per year

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