Below is a current list of registrants.
| Full Name | Company |
|---|---|
| Colin Haggerty | Stantec |
| Ken Haley | City of Fruita |
| Jeremy Hamer | City and County of Denver |
| Kyle Hamilton | Jacobs |
| Heidi Hansen | City of Fort Collins |
| Danny Harris | City and County of Denver |
| Glenn Hartmann | Garfield County |
| Erik Haugen | RTD |
| Andrew Hawthorn | City of Westminster |
| Clint Henke | ERO Resources |
| Lisy Henson | City of Commerce City - Public Works |
| Duane Herring | Contech Engineered Solutions LLC |
| Matthew Hickox | Ayres Associates |
| Chad Hill | CDM Smith |
| Dan Hill | Respec |
| Josh Hill | Wood |
| Walt Hime | City of Denver |
| Kyle Hinton | Colorado Springs Utilities |
| Chris Hodyl | Jacobs |
| David Hollingsworth | Retired |
| Josh Hollon | Kiewit Infrastructure Engineers |
| Jeffrey Holste | Wilson & Company, Inc. |
| Craig Hoover | Bohannan Huston, Inc. |
| Patrick Horn | Martin/Martin |
| Barbara Horton | Town of Castle Rock |
| Kevin Houck | Colorado Water Conservation Board |
| Sarah Houghland | Enginuity Engineering Solutions |
| Kristine House | HR Green, Inc. |
| Angela Howard | SEMSWA |
| Susan Hurd | City of Aurora |
| Janice Huson | Wood |
| Michelle Iblings | Tetra Tech |
| Chris Ide | Wood |
| Don Jacobs | Enginuity Engineering Solutions |
| Robert Jacobs | Summit County Government |
| Craig Jacobson | ICON Engineering, Inc. |
| Katie Jagt | Watershed Science And Design |
| Ajay Jain | HR Green, Inc. |
| Celeste Jain | HR Green, Inc. |
| Jacob James | Town of Parker |
| Eric Jansen | City of Gunnison |
| Matthew Johnson | HDR |
| Sara Johnson | Muller Engineering Company |
| Will Johnson | City of Boulder |
| britni kahler | SEMSWA |
| Jim Kaiser | City of Thornton |
| Brent Kaslon | Valerian |
| Cassie Kaslon | Valerian |
| Kyle Keaffaber | Oldcastle Precast - Stormwater |
| Madeline Kelley | Colorado Water Conservation Board |