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16 mechanical engineer internship jobs at 8 companies in Denver, CO

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Mechanical Engineering Intern (Fall 2026)
Golden, Colorado, United States
OnsiteFull Time, Internship
Rendezvous Robotics
Rendezvous Robotics: Develops self-assembling modular tiles for in-space infrastructure.
Pursuing a degree in mechanical/aerospace engineering or related field; proficiency in CAD; understanding of structural and thermal analysis; U.S. export-eligibility per ITAR.
Onshape, NX, SolidWorks, Fusion 360, NX Simcenter3D, FEMAP, ANSYS
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2026 Intern Conversion - Industrial Engineer I
Seattle or Van Horn or Denver or Huntsville or Florida or Arlington or Los Angeles or Longmont or Reston or California or Colorado or Washington or Virginia
$69k-$105k/yr OnsiteFull Time
Blue Origin: Develops reusable rockets and systems for human spaceflight.
Completed a 2026 Blue Origin internship, enrolled in or recently graduating from college, and holds a minimum B.S. in mechanical, aerospace, or astronautical engineering; U.S. work authorization required.
Defense Biometric Identification System (DBIDS)
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2026 Intern Conversion - Manufacturing Engineer I
North America or Seattle or Van Horn or Denver or Huntsville or Florida or Arlington or Los Angeles or Longmont or Reston or California or Colorado or Washington or Virginia
$69k-$105k/yr OnsiteFull Time
Blue Origin: Develops reusable rockets and systems for human spaceflight.
Blue Origin 2026 internship completion, college enrollment or recent graduation, BS in mechanical, aerospace, or astronautical engineering, U.S. work authorization, and full-time availability by September 2027.
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2026 Intern Conversion - Thermal Engineer I
Seattle or Van Horn or Denver or Huntsville or Florida or Arlington
$80k-$123k/yr OnsiteFull Time
Blue Origin: Develops reusable rockets and systems for human spaceflight.
Completed a 2026 Blue Origin internship; enrolled in or recently graduated from college; B.S. in mechanical, aerospace, or astronautical engineering; U.S. work authorization; strong communication and independent teamwork skills.
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2026 Intern Conversion - Aerospace Systems Engineer I
Washington or Van Horn or Denver or Huntsville or Florida or Arlington or Los Angeles or Longmont or Reston or United States
$75k-$114k/yr OnsiteFull Time
Blue Origin: Develops reusable rockets and systems for human spaceflight.
Completed a 2026 Blue Origin internship, enrolled in or recently graduating from college, able to start by September 2027, and holds a bachelor's degree in mechanical, aerospace, or astronautical engineering.
Defense Biometric Identification System (DBIDS)
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2026 Intern Conversion - Propulsion Engineer I
Seattle or Van Horn or Denver or Huntsville or Florida or Arlington or Los Angeles or Longmont or Reston
$75k-$114k/yr OnsiteFull Time
Blue Origin: Develops reusable rockets and systems for human spaceflight.
Completed a 2026 Blue Origin internship; enrolled in or recently graduated from college; bachelor's degree in mechanical, aerospace, or astronautical engineering; U.S. work authorization; strong communication and independent teamwork skills.
Defense Biometric Identification System (DBIDS)
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2026 Intern Conversion - Materials and Process Engineer I
Seattle or Van Horn or Denver or Huntsville or Florida or Arlington or Los Angeles or Longmont or Reston or United States
$75k-$114k/yr OnsiteFull Time
Blue Origin: Develops reusable rockets and systems for human spaceflight.
Completed a 2026 Blue Origin internship; enrolled in or recently graduating from college; minimum B.S. in mechanical, aerospace, or astronautical engineering; strong communication and teamwork skills; U.S. work authorization required.
Defense Biometric Identification System (DBIDS)
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Engineering Internship Summer 2026
Loveland, Colorado, United States
$16-$20/hr OnsiteInternship
Enthusiast Auto Holdings
Enthusiast Auto Holdings: Direct-to-consumer e-commerce retailer of specialty performance automotive parts.
Pursuing a bachelor's in mechanical engineering or related field; CAD proficiency (SolidWorks/CATIA), welding experience (MIG/TIG), strong analytical and communication skills; independent and team work capability.
SolidWorks, CATIA, NetSuite, Salesforce
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Manufacturing Engineer (Early Career Exceptional Talent)
Centennial, Colorado, United States
$70k-$94k/yr OnsiteFull Time
Boom Supersonic
Boom Supersonic: Develops supersonic passenger aircraft and sustainable propulsion systems.
Degree in mechanical/manufacturing/aerospace/industrial engineering or equivalent experience, 1+ internship/co-op, required hands-on manufacturing/shop experience, strong problem solving and ownership.
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2026 Intern Conversion - Software Development Engineer I
Seattle or Van Horn or Denver or Huntsville or Arlington or Los Angeles or Longmont or Reston or Florida
$101k-$155k/yr OnsiteFull Time
Blue Origin: Develops reusable rockets and systems for human spaceflight.
Completed a 2026 Blue Origin internship, enrolled in or recently graduating from college, B.S. in mechanical, aerospace, or astronautical engineering, and eligible to work under U.S. export controls.
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SkillBridge Critical Facilities Engineer, Data Center - Hiring our Heroes Cohort Q3' 2026
Ashburn or Chicago or Denver or San Jose or Dallas or Miami
HybridFull Time, Internship
Equinix
EquinixNASDAQ: EQIX: Global provider of data center and digital infrastructure services.
1+ YOETechnical associate degree, military or civilian trade school, or relevant experience; 1–4 years in mechanical engineering or related work; HVAC, critical infrastructure, data center operations, communication, and 50-pound lifting ability.
UPS, generator, BMS, chillers, life safety systems, HVAC, IT hardware, MOPs
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Underground Mining Automation Engineer
Denver or Salt Lake City or Vancouver or Toronto or Calgary
HybridMultiple Commitments Available
Worley
WorleyASX: WOR: Provides engineering and project delivery services for energy and resources.
Bachelor-level degree in Mining/Mechanical/Electrical/Mechatronics/Controls/Computer; underground mining automation experience; DCS/PLC/SCADA familiarity; strong communication and teamwork; willingness to travel; hybrid work arrangement.
DCS, PLC, SCADA, HMI, Cyber Security
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SkillBridge Critical Facilities Engineer, Data Center - Hiring our Heroes Cohort Q3' 2026
Dallas or Ashburn or Chicago or Denver or Miami or San Jose
OnsiteFull Time, Internship
Equinix
EquinixNASDAQ: EQIX: Provides global data center colocation and digital interconnection services.
1+ YOEMust meet DoD SkillBridge eligibility. Technical associate degree or military/civilian technical trade school or relevant experience (1+ years). Knowledge of UPS, generator, BMS, chillers, life-safety systems; HVAC coursework; able to lift 50 lbs; flexible for 24/7 shifts.
UPS, Generator, BMS, Chillers
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Manufacturing Co-op | Fall 2026
Lakewood, Colorado, United States
$20-$24/hr OnsiteFull Time, Internship
Primus Aerospace
Primus Aerospace: Manufactures precision machined components and integrated assemblies for aerospace.
Current engineering student in industrial, mechanical, or manufacturing engineering with SolidWorks proficiency, strong communication, problem-solving, time management, and willingness to work on the production floor.
SolidWorks, 3D printing, 5S, AS9100
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Controls Technician Intern
Littleton, Colorado, United States
$24-$28/hr FieldInternship
LONG Building Technologies
LONG Building Technologies: Provides commercial HVAC, building automation, and security solutions.
Must be 18+, legally able to drive a company vehicle, and able to interpret mechanical plans, troubleshoot software and integrations, handle physical jobsite work, and travel to jobsites.
HVAC, building automation, control systems, energy management
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2mo
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DoW Skillbridge - Senior Program Manager
Berthoud, Colorado, United States
$125k-$160k/yr OnsiteInternship
Ursa Major
Ursa Major: Designs and manufactures rocket engines and aerospace propulsion systems.
8+ YOEDoW Skillbridge internship for transitioning active-duty service members (within 180 days of retirement) with Command approval. Requires Bachelor's in Aerospace or Mechanical Engineering, 8+ years program management/aerospace leadership, eligibility for U.S. security clearance, and ability to work subject to ITAR/EAR.
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