Mechanical Engineering Intern

Hadron Energy, Inc.; California; Remote; USD 28,000 - 48,000; Full time

Job summary

Hadron Energy, Inc. seeks a Mechanical Engineering Intern to contribute to next-generation micro modular reactor design and Balance of Plant.

The role emphasizes mechanical design, drafting, and analysis, working with cross-disciplinary engineers to translate requirements into detailed CAD models and specifications. You will engage in DFMA considerations, produce engineering drawings, and support verification activities, all while advancing reactor components toward manufacturing and deployment.

Qualifications

• Pursuing a Bachelor’s or Master’s degree in Mechanical Engineering.
• Must be actively enrolled for the duration of the internship.
• Prior internship/ design project experience is preferred.
• Familiarity with 3D CAD software and drafting standards (GD&T) is expected.

Responsibilities

• Support mechanical design and drafting of reactor components and systems.
• Develop and update 3D CAD models and drawings.
• Assist with design assessments, trade studies, and optimization.
• Conduct basic mechanical calculations (loads, stresses, heat transfer).
• Collaborate with senior engineers across disciplines to implement design changes.

Skills

CAD drafting

Analytical thinking

Team collaboration

Communication skills

Education

Bachelor’s or Master’s degree in Mechanical Engineering

Active enrollment in a college/university

Tools

SolidWorks

Creo

CATIA

Siemens NX

Inventor

Job description

Hadron Energy specializes in Micro Modular Reactor (MMR) development, design, and research based in the San Francisco Bay Area. As a leading MMR developer, Hadron Energy is designing factory-produced, transportable microreactors that provide 24/7 carbon-free power for data centers, government facilities, industrial sites, and remote communities. Our mission is to create a brighter, healthier, and more equitable energy future.

Mechanical Engineering Intern – Role Description

This is a remote internship role for a Mechanical Engineering Intern, based in the United States. The position is ideal for a highly motivated engineering student who is interested in applying mechanical design, analysis, and problem-solving skills to the development of next-generation nuclear energy systems.

The Mechanical Engineering Intern will support engineering efforts across the nuclear and non-nuclear portions of Hadron Energy's micro modular reactor design and Balance of Plant. The role will primarily focus on mechanical design and drafting support, with additional opportunities to contribute to component design assessments, engineering calculations, technical documentation, and design optimization.

You will work closely with experienced mechanical, nuclear, structural, systems, and manufacturing engineers to translate engineering requirements into detailed designs and help advance reactor components from conceptual development toward manufacturing and commercial deployment.

Responsibilities

• Support mechanical design and drafting of reactor components, assemblies, systems, and Balance of Plant equipment
• Develop and update 3D CAD models, engineering drawings, assemblies, and design documentation
• Assist engineers with component design assessments, trade studies, and design optimization activities
• Support development of dimensions, tolerances, material specifications, and component interface requirements
• Assist with basic mechanical engineering calculations involving loads, stresses, heat transfer, fluid systems, or component performance
• Work with senior engineers to incorporate design changes and engineering feedback into CAD models and drawings
• Support design-for-manufacturing and assembly (DFMA) activities to improve manufacturability, simplicity, and cost
• Assist with preparation and maintenance of bills of materials (BOMs), component specifications, and technical documentation
• Support engineering reviews, design verification activities, and resolution of technical action items
• Research components, materials, manufacturing processes, and applicable engineering standards
• Coordinate with structural analysis, materials, manufacturing, procurement, and systems engineering teams as required
• Assist with prototype development, testing, vendor interactions, and component qualification activities
• Maintain organized engineering files and documentation in accordance with Hadron's engineering and quality processes
• Present technical work and project progress to engineering team members and leadership

Qualifications & Skillsets

• Currently pursuing a Bachelor's or Master's degree in Mechanical Engineering or a closely related engineering discipline
• Must be actively enrolled in an accredited college or university for the duration of the internship
• Prior engineering internship, research, design team, laboratory, or significant technical project experience preferred
• Experience with 3D CAD and mechanical drafting, preferably using SolidWorks, Creo, CATIA, Siemens NX, Inventor, or equivalent software
• Understanding of fundamental mechanical engineering principles including mechanics, materials, thermodynamics, fluid mechanics, and heat transfer
• Familiarity with engineering drawings, GD&T, tolerancing, and mechanical component design is preferred
• Exposure to finite element analysis (FEA), computational tools, or engineering simulation is a plus
• Familiarity with machining, welding, fabrication, additive manufacturing, or other manufacturing processes is beneficial
• Experience with MATLAB, Python, Excel, or other engineering analysis tools is a plus
• Strong analytical and problem-solving skills with high attention to detail
• Ability to communicate technical information clearly and collaborate effectively within multidisciplinary engineering teams
• Self-motivated, intellectually curious, and comfortable taking ownership of technical assignments
• Interest in nuclear energy, advanced manufacturing, power generation, or complex mechanical systems is highly desirable
• Passion for engineering innovation and contributing to the development of safe, scalable clean energy technology