Top 3 Manufacturing engineer intern Jobs in Boulder Co

Manufacturing Engineer Intern
H3X Technologies —Louisville, CO
- $23 - $37 an hour
- Full-time
- Communication skills
- Mechanical knowledge
- Entry level
Fall 2026 Engineering Intern- Supply Chain
King Soopers —Denver, CO
- Part-time
- Microsoft Excel
- Microsoft Outlook
- Customer service
- Paid holidays
- Health insurance
Mechanical Design Engineer Intern
H3X Technologies —Louisville, CO
- $23 - $37 an hour
- Full-time
- Communication skills
- Mechanical knowledge
- Entry level

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Manufacturing Engineer Intern

H3X Technologies -
Louisville, CO

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Job Details

Full-time
$23 - $37 an hour

Qualifications

Mechanical knowledge

Full Job Description

About the Role

At H3X, we are building the most advanced electric motors in the world for sustainable aviation, marine, industrial, and defense applications. At 12 kW/kg continuous, the HPDM family of integrated motor drives is a step change in electric propulsion technology and removes one of the main barriers blocking widespread proliferation of electric and hybrid aircraft. Our motors range in size from 30 kW to 30 MW, include integrated drives, and are 3X lighter than competitors’ systems.

H3X is looking to hire a manufacturing engineering intern to support the low volume production line across all the HPDM product lines. This is not an ordinary internship- you will be given the full responsibility of a manufacturing engineer. The production team is rapidly deploying new processes and improvements to meet the growing demand for the HPDM product lines. A high degree of self-motivation and responsibility is required as you will be given significant freedom and will be directly responsible to produce your assigned parts. We are looking to hire a full time intern with a focus on the Fall 2026 Semester for a minimum of 12 weeks, but open to extended periods as well based on candidate availability.

Responsibilities

REQUIREMENTS / CONCEPT
- Work with design engineers to establish production requirements
- Conceptualize new and novel approaches to solve manufacturing problems
- Propose new materials, fixture concepts, equipment or other
DESIGN AND ANALYSIS
- Design tools and fixtures to improve manufacturing processes
- Analyze recurring manufacturing discrepancies and implement solutions
- Collaborate with design engineers on implementation of manufacturing feedback
PRODUCTION VALIDATION AND INTEGRATION
- Execute first application and testing of new fixtures and process improvements
- Interface with manufacturing engineers and assembly technicians
- Create, implement, and revise process plans and mBOMs to support production
- Lead LEAN manufacturing processes in support of continuous improvement initiatives

Required Qualifications

Pursuing a Bachelor’s or Graduate Degree in Mechanical Engineering or similar
GPA of 3.0 or higher
Hands-on experience assembling mechanical systems
SolidWorks proficient (or similar)
Excellent written and verbal communication skills
Organized and strong attention to detail
Exceptional understanding of engineering fundamentals
Action biased, results-driven mentality
Willingness to learn quickly

Preferred Qualifications

Experience with manufacturing processes (machining, assembly, & composites)
Experience with producing 2D part drawings and GD&T
Experience with inspection methods and metrology equipment

Benefits & Compensation

$23.00 - $37.00 / hr based on school level & experience
Relocation stipend
Monthly company events
Friday Team Lunch

The Company

H3X Technologies is a U.S.-based manufacturer of electric motors for sustainable aviation, marine, industrial, and defense applications. They have developed a family of integrated motor drives that can scale in power from 30kW to 30MW with power densities as high as 12 kW/kg and best-in-class efficiency. This high performance is enabled by novel scalable core technology and proprietary manufacturing processes for motor stacking, winding, and assembly. The design, manufacturing, and testing of their products is done in-house at their headquarters in Louisville, Colorado.

H3X’s world-class team is composed of experts from Tesla, SpaceX, GE Aviation, and Siemens with deep knowledge in electric machines, power electronics, material science, control systems, and advanced manufacturing. They take pride in our multidisciplinary approach, relentless dedication, high capital efficiency, and Skunkworks-style execution.

H3X has raised over $30M and has backing from top VC firms and strategic firms including Lockheed Martin, Hanwha, Y Combinator, Cubit Capital, Metaplanet, TechNexus, and Liquid 2 Ventures to deploy capital for rapid scaleup.

H3X is poised to become the world’s leading supplier of advanced electric motors by 2030 to drive deep decarbonization in aviation, marine, and heavy industrial applications and unlock next-generation electrified defense technology to strengthen national security.

H3X is an equal opportunity-affirmative action employer and considers all qualified applicants for employment based on business needs, job requirements and individual qualifications, without regard to race, color, religion, sex, age, disability, sexual orientation, gender identity or expression, marital status, past or present military service or any other status protected by the laws or regulations in the locations where we operate.

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manufacturing engineer intern jobs in boulder co

Manufacturing Engineer Intern

Fall 2026 Engineering Intern- Supply Chain

Mechanical Design Engineer Intern

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