UNKNOWN

FEED

Our specialized experience includes design for data centers, healthcare, science and technology, high-rise buildings, clean energy, education, and other building types as well as structural and building sciences, infrastructure asset management, advanced robotics, and more. Examples of the type of work to be performed include the design of mechanical and plumbing components and systems; engineering calculations and analysis of thermal and fluid dynamics; development of HVAC system designs for a variety of facility types; and fire protection and life safety system design and integration.

Salas O'Brien

Junior Mechanical Engineer

Mechanical Engineer

Realta Fusion is a rapidly growing start-up developing compact magnetic mirror fusion energy systems to address the biggest challenge of our time - tackling global climate change while ensuring a sufficient energy supply for at least ten billion people on (and off) earth. Lead the mechanical design and integration of beamline components, ion source assemblies, extraction/acceleration grids, and associated accelerator equipment from concept through fabrication and commissioning.

Realta Fusion Inc

Senior Mechanical Engineer, Accelerator Technology

ADAPTED_NOW

Using sound mechanical engineering practices, this role is responsible for developing and improving Rytec’s product lines by executing and documenting Engineering Change Orders (ECOs) and project tasks. Analysis may include static and dynamic evaluation, development of free-body diagrams, force and torque load analysis, stress analysis, power and torque calculations, design validation methods, and other mechanical performance assessments.

Nucor

Mechanical Engineer II

YEAR

What we're looking for: 5+ years of mechanical product design experience using a solid-body CAD platform (Fusion 360, SOLIDWORKS, Inventor, or similar). In this role, you'll design rugged enclosures and thermal management systems for embedded products, owning designs from concept through production.

Sentient Industries

Workable

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. General Dynamics Mission Systems (GDMS) engineers a diverse portfolio of high technology solutions, products and services that enable customers to successfully execute missions across all domains of operation.

General Dynamics Corp

Sabre UAV Advanced Mechanical Engineer

ITAR Requirements: This position requires compliance with U.S. Government space technology trade restrictions, specifically the International Trafficking in Arms Regulations (ITAR), Export Administration Regulations (EAR) and additional regulations governing satellite, launch vehicle, missile, and other related technologies. The ideal candidate will blend deep expertise in mechanical design for extreme environments with a proven ability to drive design-for-manufacture (DFM) and design-for-assembly (DFA) principles into hardware that must survive launch and operate for years in space.

Astra

Staff Mechanical Engineer, Spacecraft Engine

Any unsolicited submission - via email, our website, social media, or directly to an employee - will be deemed the property of Relativity Space, and no fee will be owed absent a current, fully executed agreement with Talent Acquisition that specifically authorizes submissions for the applicable role. You will be responsible for ensuring the delivered Avionics can survive launch and space environments, and for solving complex thermal and structural challenges in tight, mass-efficient packaging.

Relativity Space Inc

Avionics Mechanical Engineer II

Youll work alongside engineers specializing in reactor design, thermal hydraulics, safety analysis, and operations, helping transform complex engineering concepts into practical, manufacturable, and regulatory-compliant systems. Youll have the chance to own critical mechanical components, collaborate with multidisciplinary engineering teams, and participate in the full lifecycle of reactor development-from initial design and analysis through manufacturing and deployment.

NANO Nuclear Energy Inc

Mechanical Engineer - Reactor Development

To conform to U.S. Government space technology export regulations, including the International Traffic in Arms Regulations (ITAR), you must be a U.S. citizen, lawful permanent resident of the U.S., protected individual as defined by 8 U.S.C. 1324b(a)(3), or eligible to obtain the required authorizations from the U.S. Department of State. You'll coordinate with vendors and machine shops to get flight-quality hardware built, and work closely with RF, electrical, and systems engineers to integrate the payload with the rest of the spacecraft.

Array Labs

Prototyping & Testing: Build physical prototypes, set up thermal/mechanical test vehicles, and execute environmental reliability tests (e.g., thermal cycling, drop testing). In this role, you will work alongside senior engineers to design, analyze, and test the physical architecture of next-generation Solid State Drives (SSDs) for enterprise and data center applications.

HOUR

SK hynix memory solutions America Inc.

Intern, Mechanical Engineer

GreenHouseAPI

This role will provide mechanical engineering leadership for system evaluations, design input development, equipment specifications, hydraulic calculations, piping design, and technical review of engineering analyses supporting plant uprate feasibility and modifications. The ideal candidate will have strong commercial nuclear experience and significant knowledge of mechanical systems, piping, P&IDs, pumps, valves, tanks, hydraulic analysis, and power plant retrofit design .

4P Consulting

Mechanical Engineer SR 1 4P/844

Candidates who primarily provide technical leadership within one team, subsystem, or technical area may be better aligned to a Staff Mechanical Engineer role, while candidates who serve as a company-level technical authority in a critical domain may be better aligned to a Principal Mechanical Engineer role. A strong candidate should be able to operate with high autonomy, frame ambiguous system-level problems, align stakeholders, improve technical decision quality across projects, and help teams avoid rework caused by weak assumptions, incomplete validation, or missed integration risks.

Mainspring Energy Inc

Senior Staff Mechanical Engineer

and/or transports placardable amounts of hazardous materials by ground in any vehicle on a public road while in commerce, may be subject to additional Federal Motor Carrier Safety Regulations including: Driver Qualification Files, Medical Certification (obtained before onboarding), Road Test, Hours of Service, Drug and Alcohol Testing, vehicle inspection requirements, CDL requirements (if applicable) and hazardous materials transportation/shipping training. Required for Certain Job Profiles: Drivers who operate Commercial Motor Vehicles with a Gross Vehicle Weight (GVW), Gross Vehicle Weight Rating (GVWR) or combination of power unit and trailer that meets or exceeds 10,001 lbs.

Blue Origin

Thermal Engineer I - Early Career (2027 Starts)

ea_via_bold

Portable nuclear power with rapid-deploy capability can replace similar-sized diesel generators and provide critical asset support for hospitals, data centers, remote sites, and military bases. Radiant's unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials.

Radiant Nuclear

Senior Thermal-Hydraulics Engineer

In addition, certain roles also have the opportunity to receive and/or participate in profit sharing, allowances, travel and/or car expenses, and earn sales incentives based on revenue or utilization depending on the terms of the employee's role and individual offer details. We design, manufacture and service the mission-critical infrastructure technologies for vital applications in data centers, communication networks and commercial and industrial environments.

Vertiv Group Corp.

Technical Sales Sr. Engineer - Thermal

Senior Thermal Modeling Engineer

This role will interface with the appropriate Vertiv Offering Management or Design teams to ensure compliance with project proposals and to provide input as to customer needs into the business. Work with Bid Teams, Sales Offices and Account teams to analyze technical specifications, ensuring that Vertiv products meet customer design intent.

Application Engineer - GSA Thermal Management

Success criteria will be able to learn quickly how to install thermocouples on devices, able to kick off automated test scripts, able to monitor tests that are running in the chambers, if tests fail use documented debugging steps to troubleshoot, running manual tests and keeping labs neat and clean. Isolate and report defects effectively quantifying customer impact, and verify fixes through regression testing and other test methodologies.

Tata Consultancy Services Ltd

Thermal Test Python Automation Engineer

To ensure your safety and help you navigate your job search with confidence, please keep the following critical points in mind: No Financial Requests: Anduril will never solicit payment or demand personal financial details (such as banking information, credit card numbers, or social security numbers) at any stage of our hiring process. This third-party service provider provides risk-intelligence services that may include analysis of sanctions and watchlists, adverse media, public-record information, and other lawful open-source or commercial data sources.

Thermal Engineer Jobs in the United States

Junior Mechanical Engineer Salas O'Brien

Mechanical Engineer Salas O'Brien

Senior Mechanical Engineer, Accelerator Technology Realta Fusion Inc

Mechanical Engineer II Nucor

Mechanical Engineer Sentient Industries

Sabre UAV Advanced Mechanical Engineer General Dynamics Corp

Staff Mechanical Engineer, Spacecraft Engine Astra

Avionics Mechanical Engineer II Relativity Space Inc

Mechanical Engineer - Reactor Development NANO Nuclear Energy Inc

Mechanical Engineer Array Labs

Intern, Mechanical Engineer SK hynix memory solutions America Inc.

Mechanical Engineer SR 1 4P/844 4P Consulting

Senior Staff Mechanical Engineer Mainspring Energy Inc

Thermal Engineer I - Early Career (2027 Starts) Blue Origin

Senior Thermal-Hydraulics Engineer Radiant Nuclear

Technical Sales Sr. Engineer - Thermal Vertiv Group Corp.

Senior Thermal Modeling Engineer Radiant Nuclear

Application Engineer - GSA Thermal Management Vertiv Group Corp.

Thermal Test Python Automation Engineer Tata Consultancy Services Ltd

Staff Thermal Engineer, Hypersonic Air Vehicles Anduril Industries Inc

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