Internships › Mechanical Engineering › Washington

Mechanical Engineering internships in Washington

19 open student roles in mechanical engineering in Washington, from internships to co-ops and research. That includes 7 co-ops and 1 part-time role. 42% list pay or say they are paid. The most common start terms are Summer 2027 and Fall 2027. Employers with the most openings: Marathon Petroleum, Schweitzer Engineering Laboratories, Anduril, Shield AI and Allegion.

• Marathon Petroleum
  Intern/Co-op - Midstream Natural Gas and NGL Services Chemical/Mechanical/Civil/Petroleum/Electrical Engineering (Fall 2027)
  Washington, Pennsylvania +12 · Fall 2027 · co-op · $33.54 per hour
  Open posting
• Marathon Petroleum
  Intern/Co-op - Midstream Natural Gas and NGL Services Chemical/Mechanical/Civil/Petroleum/Electrical Engineering (Summer 2027)
  Washington, Pennsylvania +12 · Summer 2027 · co-op · $33.54 per hour
  Open posting
• Marathon Petroleum
  Intern/Co-op - Midstream Natural Gas and NGL Services Chemical/Mechanical/Civil/Petroleum/Electrical Engineering (Spring 2027)
  Washington, Pennsylvania +12 · Spring 2027 · co-op · $33.54 per hour
  Open posting
• Shield AI New
  Summer 2027 - Mechanical Engineering Intern
  Seattle, Washington +1 · Summer 2027 · Paid
  Open posting
• Allegion
  Summer Intern - Mechanical Engineering
  Everett, WA · Summer
  Open posting
• GenScript
  mRNA Manufacturing Intern (Full Time)
  Redmond, Washington, United States
  Open posting
• HNTB
  Intern Electrical and Mechanical/Fire Protection Engineering (Summer 2027)
  Bellevue, WA (Seattle) · Summer 2027
  Open posting
• Stryker
  Manufacturing Engineering Intern
  Redmond, Washington +1
  Open posting
• Marathon Petroleum
  Intern/Co-op - Refining Mechanical Engineer (Fall 2027)
  Anacortes WA Refinery +13 · Fall 2027 · co-op · $32.92 per hour
  Open posting
• Marathon Petroleum
  Intern/Co-op - Refining Mechanical Engineer (Summer 2027)
  Anacortes, Washington +14 · Summer 2027 · co-op · $32.92 per hour
  Open posting
• Shield AI
  Summer 2027 - Advanced Manufacturing Engineering Intern
  Seattle, Washington +1 · Summer 2027 · Paid
  Open posting
• Anduril
  2027 Manufacturing Engineer Intern
  Seattle, Washington, United States +7
  Open posting
• Anduril
  2027 Mechanical Engineer Intern
  Seattle, Washington, United States +8
  Open posting
• Zoox
  Contract Student Worker – Firmware Engineer (FW Thermal/Body)
  Seattle, WA +3 · part-time
  Open posting
• Schweitzer Engineering Laboratories New
  Mechanical Engineering Intern
  Washington - Pullman
  Open posting
• Schweitzer Engineering Laboratories New
  Machine Shop Intern
  Washington - Pullman
  Open posting
• Marathon Petroleum
  Intern/Co-op - Refining Mechanical Engineer (Spring 2027)
  Anacortes, Washington +14 · Spring 2027 · co-op · $32.92 per hour
  Open posting
• Schweitzer Engineering Laboratories
  Mechanical Engineer Intern
  Washington - Pullman
  Open posting
• Framatome
  (Mechanical Engineering) Intern - Univ/Co-Op Technical (Richland)
  Richland, WA · co-op
  Open posting

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Updated September 26, 2026. Listings are collected from public job boards several times a day; always check the posting on the employer's site before applying.