Top 65 Mechanical engineering intern Jobs in Denver, Co

Test Engineering Intern (Spring)
H3X Technologies —Louisville, CO
- $23 - $37 an hour
- Full-time
- Assembly
- Communication skills
- Entry level
- Relocation assistance
- Flexible schedule
2d
Electromagnetics Engineering Intern (Spring)
H3X Technologies —Louisville, CO
- $23 - $37 an hour
- Full-time
- Bachelor of Science
- Laboratory experience
- Analysis skills
- Relocation assistance
- Flexible schedule
2d
Material & Processes Engineering Intern
Canopy A&D —Littleton, CO
- $25 an hour
- Computer literacy
- English
- Ability to sit for extended periods
- Paid holidays
- Health insurance
Quick Apply
Mechanical Design Engineer Intern (Spring)
H3X Technologies —Louisville, CO
- $23 - $37 an hour
- Full-time
- Communication skills
- Entry level
- Relocation assistance
- Flexible schedule
2d
Graduate Intern – Advanced Building Equipment Research Group
National Laboratory of the Rockies —Golden, CO
- $44,500 - $71,200 a year
- Urgently hiring
- Pass drug screening
- Master's degree
- Bachelor's degree
- 403(b) matching
- Health insurance
Undergraduate or Graduate Internship for Critical Material Enabling Analysis
National Laboratory of the Rockies —Golden, CO
- $51,200 - $81,900 a year
- Full-time
- Pass drug screening
- Master's degree
- Analysis skills
- 403(b) matching
- Health insurance
GSE Engineering Intern
True Anomaly —Denver, CO
- $28 - $32 an hour
- Full-time
- Reliable transportation
- Electrical Engineering
- Internship
6d
Intern, BESS Design (Utility Scale Renewables)
ENGIE —Broomfield, CO
- $25.50 an hour
- Part-time
- Office
- Analysis skills
- In-person
Advanced Manufacturing Engineering Intern (Spring)
H3X Technologies —Louisville, CO
- $23 - $37 an hour
- Full-time
- Communication skills
- Entry level
- Relocation assistance
- Flexible schedule
2d
Graduate (Year-Round) Internship – Digital Twin Development for Biorefinery Processes
National Laboratory of the Rockies —Golden, CO
- $44,500 - $71,200 a year
- Full-time
- Doctoral degree
- Pass drug screening
- Data analysis skills
- 403(b) matching
- Health insurance
Civil Engineering Intern
Kimley-Horn —Broomfield, CO
- $27 - $31 an hour
- Engineering
- Office
- Bachelor's degree
3d
Mechanical Engineering Intern | Greenwood Village, CO
IMEG Corp. —Denver, CO
- $22 - $24 an hour
- Full-time
- Microsoft Outlook
- Construction site
- Bachelor of Science
- Wellness program
- Paid holidays
14h
Internship / Co-op
PROVIDENCE INFRASTRUCTURE CONSULTANTS —Highlands Ranch, CO
- $20 - $25 an hour
- Full-time
- Civil engineering
- Construction site
- Office
- Travel reimbursement
- Continuing education credits
Quick Apply
Intern (Summer 2027)
HPM INC —Englewood, CO
- $25 an hour
- Overtime
- 18 years or older
- Construction site
- Pass drug screening
- Paid holidays
- 401(k) 4% Match
Quick Apply
14d
Power Delivery Intern (Summer 2027)
HDR —Denver, CO
- $22 - $26 an hour
- Temporary
- Civil engineering
- Civil Engineering
- Communication skills
- Paid holidays
- Disability insurance
Electrical Engineering Intern | Greenwood Village, CO
IMEG Corp. —Denver, CO
- $22 - $24 an hour
- Full-time
- Microsoft Outlook
- Construction site
- Bachelor of Science
- Wellness program
- Paid holidays
14h
Civil Engineering Intern | Greenwood Village, CO
IMEG Corp. —Denver, CO
- $22 - $24 an hour
- Full-time
- Civil engineering
- Construction site
- Bachelor of Science
- Wellness program
- Paid holidays
1d
SPR Engineer I-II
City of Englewood —Englewood, CO
- $72,512 - $119,892 a year
- Pass drug screening
- 3 years
- Driver's License
- Paid holidays
- Health insurance
8d
Process Engineer - Maintenance & Support Systems
Atlas Roofing Corporation —Denver, CO
- $85,000 - $120,000 a year
- Full-time
- Hybrid work
- Up to 50% travel
- English
- Mid-level
- AD&D insurance
- Disability insurance
Quick Apply
Control Systems Engineer – Test & Measurement
Xcimer Energy —Denver, CO
- $130,000 - $160,000 a year
- Full-time
- Mid-level
- Fair chance
- 1 year
- Paid parental leave
- Paid holidays
Quick Apply

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mechanical engineering intern jobs near denver, co

Test Engineering Intern (Spring)

H3X Technologies -
Louisville, CO

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Job Details

Full-time
$23 - $37 an hour
2 days ago

Benefits

Relocation assistance
Flexible schedule

Qualifications

Diagnostic test interpretation
Diagnostic result interpretation
Defect resolution root cause analysis
Requirements specification
Requirements design
Safety training program participation as safety practice
Performance testing in mechanical engineering
Defect analysis
Supply chain
Mechanical Engineering
CAD design (engineering design task)
Assembly
Electrical motors
System validation
Requirements analysis
Design engineering
Hazard identification and correction
Prototype creation
Product design
Test Execution (Quality assurance practices)
Occupational safety risk assessments
Experience in a research and development laboratory environment
Root cause analysis
Test analysis
Research & development
Mechanical product validation projects
Occupational safety program implementation
Prototypes
Communication skills
Entry level

Full Job Description

About H3X Technologies

H3X is building America's advanced electric motor company, powering next-generation platforms in aerospace, defense, and marine. Our integrated motor drives deliver 12+ kW/kg, roughly 3x the power density of competing solutions. We're now scaling to megawatt-class systems, with customers working on everything from supersonic aircraft to turbine power generation for AI datacenters.

Our team brings together engineers and operators from aerospace, defense, and motorsports, with deep expertise in electric machines, power electronics, material science, and advanced manufacturing. We're a small, fast-moving team doing hard engineering that matters, and we're looking for people who want to do the best work of their careers alongside us.

About the role

H3X is looking to hire a test engineering intern this to support R&D and production testing across the HPDM product line. This is not an ordinary internship. You will be given the full responsibility of a test engineer. The engineering team is intentionally small and operates at a very fast pace. A high degree of self-motivation and responsibility is required as you will be given significant freedom and will be directly responsible for your parts. We are looking for a full time Spring Intern, but also have availability for Summer 2027 and extended Co-Op positions.

What you will do:

Requirements/Concept
- Establish and document requirements to fulfill testing equipment design needs
- Conceptualize test equipment designs
- Gather and consolidate requirements for R&D test suites in the form of test plans
Design and Analysis
- Design parts and assemblies utilizing SolidWorks
Prototype and Manufacturing
- Compile complete Bills of Materials
- Provide technical supply chain support for sourcing hardware
- Work with technicians and test engineers to build initial prototypes
- Test prototype equipment for verification
Testing and Validation
- Create a test plan and checklist to validate product design targets
- Support testing execution and characterization of new designs
- Interpret test results, identify root-cause of issues, and make design recommendations to meet the highest level of reliability and performance
Integration
- Support complete system tests
Other
- Identify workplace hazards and implement safe processes
- Maintain testing and production equipment where necessary

What we are looking for:

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

Nice to Have Experience:

Experience with dynamometer testing
Experience with electric motors and/or inverter drives
Experience with data processing

Compensation & Benefits

Salary/Hourly Compensation Range: $23 - $37/hr based on school level & experience
Flexible hours (deliverable-based goals)
Relocation package
Monthly company events
Friday Team Lunches

Why H3X

Joining H3X means working on hard, meaningful problems with a skunkworks-style team that's laser-focused on building exceptional products. We're deeply vertically integrated and have a very tight design-build-test loop, which lets us move from concept to hardware at unmatched speed. We've gone from idea to shipping product in less than two months.

We're a small, highly skilled team where everyone carries real responsibility and shares an extreme ownership mentality. We stay focused on the critical path, keep bureaucracy to a minimum, and structure everything around delivering results. You'll learn and grow faster here than you would anywhere else.

You'll work alongside world-class engineers and builders who are pioneering electric motor technology at scale on some of the coolest programs in the industry, from supersonic aircraft to power generation for AI datacenters. If you want your contributions to be visible and your work to directly shape American reindustrialization, you'll feel at home here.

Our Values

Be Relentless Never give up, persevere until the job is done. Run toward problems, not away from them. Grit is key.

Gain insight through humility Approach every challenge with a learner’s mindset. Stay open to feedback, listen to others, and deepen your understanding through self-awareness. Put your ego aside and seek the truth in every discussion, especially when leading others.

Distill & Simplify Eliminate unjustified complexity and simplify wherever possible, whether in requirements, design, or execution. Use first principles thinking to distill every problem to its essence. Less is more.

Find your flow Engage fully and work with intention. Find the rhythm and deep focus that lets you do your best work. Discover your Ikigai - where your strengths, passions, and purpose meet and drive your personal fulfillment and team success. That is when the magic happens.

SEND (Solve, Evolve, Nail It, Deliver) Devise the best solution with the information at hand, test it, learn from it, and iterate quickly until you nail it. Nothing works perfectly the first time, but you should never hit the same issue twice. Stay laser-focused on solving customer problems and delivering solutions that create real value.

Equal Opportunity Employer

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.

Apply Now

Refine Your Search

mechanical engineering intern jobs in denver, co

Test Engineering Intern (Spring)

Electromagnetics Engineering Intern (Spring)

Material & Processes Engineering Intern

Mechanical Design Engineer Intern (Spring)

Graduate Intern – Advanced Building Equipment Research Group

Undergraduate or Graduate Internship for Critical Material Enabling Analysis

GSE Engineering Intern

Intern, BESS Design (Utility Scale Renewables)

Advanced Manufacturing Engineering Intern (Spring)

Graduate (Year-Round) Internship – Digital Twin Development for Biorefinery Processes

Civil Engineering Intern

Mechanical Engineering Intern | Greenwood Village, CO

Internship / Co-op

Intern (Summer 2027)

Power Delivery Intern (Summer 2027)

Electrical Engineering Intern | Greenwood Village, CO

Civil Engineering Intern | Greenwood Village, CO

SPR Engineer I-II

Process Engineer - Maintenance & Support Systems

Control Systems Engineer – Test & Measurement

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