Internships › Environmental Science and Engineering › Colorado

Environmental Science and Engineering internships in Colorado

31 open student roles in environmental science and engineering in Colorado, from internships to co-ops and research. That includes 8 co-ops and 1 part-time role. 35% 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, Xcel Energy, CDM Smith, Air Force Civilian Career Training and Mortenson.

• TRC Companies New
  Environmental Intern
  Lakewood, Colorado +32 · Summer 2027 · part-time · Paid
  Open posting
• IMEG
  Sustainability & Energy Engineering Intern
  Denver Metro, CO +8 · Summer 2027 · $22.00–$24.00 per hour
  Open posting
• Ovintiv
  Intern Air Quality
  Denver, CO, US
  Open posting
• Marathon Petroleum
  Intern/Co-op - HES&S Environmental (Summer 2027)
  Denver, Colorado +18 · Summer 2027 · co-op · $24.09 per hour
  Open posting
• Marathon Petroleum
  Intern/Co-op - HES&S Safety and Industrial Hygiene (Summer 2027)
  Denver, Colorado +21 · Summer 2027 · co-op · $24.09 per hour
  Open posting
• Marathon Petroleum
  Intern/Co-op - HES&S Safety and Industrial Hygiene (Fall 2027)
  Denver, Colorado +21 · Fall 2027 · co-op · $24.09 per hour
  Open posting
• Marathon Petroleum
  Intern/Co-op - HES&S Environmental (Spring 2027)
  Denver, Colorado +18 · Spring 2027 · co-op · $24.09 per hour
  Open posting
• Marathon Petroleum
  Intern/Co-op - HES&S Safety and Industrial Hygiene (Spring 2027)
  Denver, Colorado +21 · Spring 2027 · co-op · $24.09 per hour
  Open posting
• Marathon Petroleum
  Intern/Co-op - HES&S Environmental (Fall 2027)
  Denver, Colorado +18 · Fall 2027 · co-op · $24.09 per hour
  Open posting
• National Laboratory of the Rockies
  Graduate (Year-Round) Intern: Geospatial Data Science Modeling and Analysis
  Golden, CO · Year-round
  Open posting
• WSP
  Geological Engineering Intern - Summer 2027
  Lakewood, CO +2 · Summer 2027
  Open posting
• Entegris
  Environmental Health & Safety Co-Op
  Rockrimmon, Colorado Springs, CO +2 · co-op
  Open posting
• AtkinsRéalis
  Water Resources Engineering Intern – Summer 2027
  US.CO.Denver +1 · Summer 2027
  Open posting
• Trimble
  12-Month Geospatial Intern
  US - CO
  Open posting
• Xcel Energy
  Occupational Health & Safety Intern- CO
  Henderson, CO, 80640
  Open posting
• Xcel Energy
  Renewable Operation Center Intern- CO
  Golden, CO, 80401 +1 · Summer 2027
  Open posting
• Xcel Energy
  Renewable and Demand Response Intern
  Denver, CO · Summer 2027
  Open posting
• Xcel Energy
  Renewable and Demand Response Intern- CO
  Denver, CO, 80205 +1 · Fall 2027 · $20.90 per hour
  Open posting
• CDM Smith
  Water Resources Engineering Intern (Summer 2027!)
  Denver, Colorado · Summer 2027
  Open posting
• CDM Smith
  Environmental Engineering Intern (Summer 2027!)
  Denver, Colorado +12 · Summer 2027
  Open posting
• CDM Smith
  Environmental Engineering CO-OP (Winter/Spring 2027)
  Denver, Colorado · Winter 2027 · co-op
  Open posting
• Xcel Energy
  Geospatial Data Validation Intern
  Denver, CO +1 · Summer 2027
  Open posting
• Olsson
  Engineering Internship - Industrial Environmental
  Denver, CO
  Open posting
• Olsson
  Engineering Internship - Water Resources
  Denver, CO +7
  Open posting
• Mortenson
  Sustainability Intern
  Denver, CO · Summer 2027
  Open posting
• Mortenson
  Environmental Intern
  Denver, CO
  Open posting
• Air Force Civilian Career Training
  Physical Scientist (Environmental)
  Air Force Academy, Colorado +44 · $49960 - $99314 Per Year
  Open posting
• Air Force Civilian Career Training
  Biological Scientist (Environmental)
  Buckley AFB, Colorado +54 · $49960 - $99314 Per Year
  Open posting
• Occidental Petroleum Corporation (Oxy)
  Geology Intern
  Denver, Colorado +2 · Summer
  Open posting
• Occidental Petroleum Corporation (Oxy)
  Geophysics Intern
  Denver, Colorado +2 · Summer
  Open posting
• Chevron Corporation
  2026-2027 Health, Safety and Environment Intern
  Greeley, Colorado, United States of America +12
  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.