Below is a current list of registrants.
| Full Name | Company |
|---|---|
| Paul Geiger | Summit County |
| Thomas Gilbert | City of Greeley Community Development |
| Penn Gildersleeve | Retired |
| Kevin Gingery | City of Loveland |
| John Giordanengo | AloTerra Restoration Services |
| Robby Glenn | City of Boulder |
| Doug Gossett | City of Longmont |
| Michael Grabczyk | Town of Parker |
| Peggy Graham | Advanced Drainage Systems |
| Cody Gratny | JVA, Inc. |
| Alfred Gross | Colorado DOT |
| Eli Gruber | CDM Smith |
| Carrie Gudorf | Mesa County |
| David Guetig | Galloway & Co. |
| Colin Haggerty | Stantec Consulting |
| Ken Haley | City of Fruita |
| Timothy Halopoff | JR Engineering |
| KristiLee Halpin | CORVUS Environmental |
| Michael Hamacher | Naranjo Civil Constructors, Inc. |
| Basil Hamdan | City of Fort Collins Utilities |
| Jeremy Hamer | City & County of Denver Public Works |
| Kyle Hamilton | Jacobs |
| Tarah Hamlyn | SEMSWA |
| Brice Hammersland | Kimley-Horn |
| Heidi Hansen | City of Fort Collins |
| Rob Hansen | CORE Consultants |
| Nicole Harwell | SEMSWA |
| Andrew Hawthorn | City of Westminster |
| Haley Heinemann | Dewberry |
| Dan Hill | Mile High Flood District |
| Walter Hime | City & County of Denver-Denver Wastewater |
| Kyle Hinton | Colorado Springs Utilities |
| Hung-Teng Ho | Matrix Design Group |
| Chris Hodyl | Jacobs |
| David Hoesly | SEH |
| Josh Hollon | Kiewit Infrastructure Engineers |
| Jeff Holste | Wilson & Company, Inc. |
| Craig Hoover | Bohannan Huston, Inc. |
| Patrick Horn | Martin/Martin, Inc. |
| Kevin Houck | Colorado Water Conservation Board |
| Sarah Houghland | Enginuity Engineering Solutions |
| Kristine House | HR Green, Inc. |
| Hanna Huling | Meshek & Associates, LLC |
| Steven Humphrey | Muller Engineering Company |
| Michelle Iblings | Drexel, Barrell, and Co. |
| Chris Ide | Wood |
| Don Jacobs | Enginuity Engineering Solutions |
| Craig Jacobson | ICON Engineering, Inc. |
| Chris Jain | Murraysmith |
| Eric Jansen | City of Gunnison |