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Top Climate tech companies in Denver

Companies decarbonising power, transport, agriculture, and industry. Filtered to companies headquartered in Denver.

Built from a search like: “Top Climate tech companies in Denver”

Ranked by current headcount across Climate tech companies headquartered in Denver. Refreshed daily.

  1. 1
    HPC Industrial powered by Clean Harbors· Deer Park, Texas, United States
    • 910 employees
  2. 2
    UDS· Valley Center, Kansas, United States
    • 763 employees
    • Founded 2008
  3. 3
    HydroChemPSC· Deer Park, Texas, United States
    • 728 employees
    • Founded 1977
  4. 4
    IDE Technologies· Kadima - Zoran, Center District, Israel
    • 612 employees
    • Founded 1965
  5. 5
    HydroChem LLC· Deer Park, Texas, United States
    • 490 employees
    • Founded 1938
  6. 6
    Aventia· Denver, Colorado, United States
    • 334 employees
    • Founded 2022
  7. 7
    Kimble Companies· Dover, Ohio, United States
    • 326 employees
    • Founded 1948
  8. 8
    Delaware Department of Natural Resources and Environmental Control· Dover, Delaware, United States
    • Series F
    • 299 employees
    • Founded 1979
  9. 9
    LVI Services, Inc.· Denver, Colorado, United States
    • 217 employees
    • Founded 1986
  10. 10
    Mile High Youth Corps· Denver, Colorado, United States
    • 138 employees
    • Founded 1992
  11. 11
    USA Environment, LP· Deer Park, Texas, United States
    • 131 employees
    • Founded 1991
  12. 12
    RGS Energy· Denver, Colorado, United States
    • 128 employees
    • Founded 1978
  13. 13
    ECO-PAN INC.· Denver, Colorado, United States
    • 121 employees
    • Founded 1992
  14. 14
    BlueGen Ltd.· Kfar Saba, Center District, Israel
    • 120 employees
    • Founded 1988
  15. 15
    National Environmental Health Association (NEHA)· Denver, Colorado, United States
    • 110 employees
    • Founded 1937
  16. 16
    Bio-One Inc· Denver, Colorado, United States
    • 102 employees
    • Founded 2008
  17. 17
    EDF power solutions Israel· Hod HaSharon, Center District, Israel
    • 97 employees
    • Founded 2009
  18. 18
    First In Rescue Safety and Training, LLC· Deer Park, Texas, United States
    • 94 employees
    • Founded 2008
  19. 19
    AK Industries, Inc.· Plymouth, Indiana, United States
    • 91 employees
    • Founded 1981
  20. 20
    Neptune and Company, Inc.· Denver, Colorado, United States
    • 90 employees
    • Founded 1992
  21. 21
    DHVmed· Kfar Saba, Center District, Israel
    • 90 employees
    • Founded 1996
  22. 22
    El-Mor Renewable Energy· Zur Izhak, Center District, Israel
    • 87 employees
  23. 23
    WRT· Denver, Colorado, United States
    • 86 employees
    • Founded 2002
  24. 24
    Volta Solar· Petah Tikva, Center District, Israel
    • 86 employees
    • Founded 2017
  25. 25
    Geotech Environmental Equipment, Inc.· Denver, Colorado, United States
    • 84 employees
    • Founded 1978

Find engineers at Climate tech companies in Denver

Denver has long been a hub for Climate tech, and the list above ranks the largest Climate tech companies headquartered there by current headcount, drawn from public LinkedIn and Crunchbase records. With 171 matching companies in our index, this is a good map of where the Climate tech talent in Denverlives — useful whether you’re recruiting, partnering, or sizing a market.

The biggest Climate tech companies in Denver tend to be the gravitational centres for specialised talent — senior engineers, ML researchers, applied scientists, designers — while the smaller ones compete on speed, equity, and proximity to founders.

Refolk converts this list into a live search. Ask for “Climate tech engineers in Denverhiring senior staff” or “founders of Climate tech companies in Denverwho left in the last 12 months” and Refolk returns a ranked shortlist with the evidence that earned each person a spot.

How this list is built

Refolk pulled Climate tech companies headquartered in Denver from public LinkedIn and Crunchbase records, ranked them by current employee count, and kept those with at least 10 employees. The list refreshes once a day.

Last refreshed: Thu, 07 May 2026 06:47:20 GMT

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