12 mechanical engineering internships jobs at 3 companies in Denver, CO

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Mechanical Engineer (Early Career, Exceptional Talent)
Centennial, Colorado, United States
$87k-$117k/yr OnsiteFull Time
Boom Supersonic
Boom Supersonic: Develops supersonic passenger aircraft and sustainable propulsion systems.
Mechanical or aerospace engineering degree or equivalent hands-on experience; internship or co-op; 3D CAD, structural and thermal FEA; mechanical engineering fundamentals and hands-on hardware experience.
NX, SolidWorks, CATIA, FEA
3w
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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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Turbomachinery Engineer (Early Career, Exceptional Talent)
Centennial, Colorado, United States
$87k-$117k/yr OnsiteFull Time
Boom Supersonic
Boom Supersonic: Develops supersonic passenger aircraft and sustainable propulsion systems.
Aerospace or mechanical engineering degree, or equivalent propulsion experience; internship or equivalent hands-on experience; CFD, cycle analysis, or FEA proficiency; and fundamentals in thermodynamics, fluid mechanics, heat transfer, and combustion.
Ansys Fluent, STAR-CCM+, OpenFOAM, NPSS, GasTurb, pyCycle, Abaqus, Ansys Mechanical, Nastran, CalculiX, GPU
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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 - 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 - 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 - 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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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.
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.