Below is a current list of registrants.
| Full Name | Company |
|---|---|
| Tim DeMasters | CORVUS Environmental |
| Tyler Dell | Colorado Stormwater Center - CSU |
| Jeremy Deischer | ICON Engineering, Inc. |
| Stephen Decker | Westervelt Ecological Services |
| Matthew Deaver | City & County of Broomfield |
| Jenna David | AECOM |
| Jack Danneberg | City of Aspen |
| Michelle Danaher | Olsson |
| Keith Curtis | Pikes Peak Regional |
| Griffin Cullen | AECOM |
| Lisa Cratty | Stormwater Compliance Solutions, LLC |
| Brad Cox | City & County of Denver |
| Adam Copper | City of Colorado Springs, Water Resources Engineering Division |
| Aaron Cook | Jacobs |
| Jared Coleman | City of Aurora - Public Works |
| Jane Clary | Wright Water Engineers |
| Tiffany Clark | SEMSWA |
| Lia Clark | Muller Engineering Company |
| Jesse Clark | Stream Landscape Architecture |
| Derek Clark | Stantec Consulting |
| Tyler Christoff | City of Aspen |
| Catherine Christoff | Pitkin County |
| Stephen Choi | City & County of Denver |
| Jed Chambers | Colorado Springs Utilities |
| David Center | AECOM |
| Ken Cecil | Dewberry |
| Chris Castelli | Kiowa Engineering Corp. |
| Mike Cartmell | El Paso County Department of Public Works |
| Steve Carter | Bio Clean Environmental |
| Ryan Carroll | Michael Baker International |
| Brendan Carroll | RS&H |
| Jason Carr | S. A. Miro, Inc. |
| Amy Carr | Wood |
| Troy Carmann | ICON Engineering, Inc. |
| Mary Carlson | JVA, Inc. |
| Keely Campbell | Ayres Associates |
| Ryan Byrne | Martin/Martin, Inc. |
| Michael Butters | Michael Baker International |
| Sloane Bullecks | Bienenstock Natural Playgrounds |
| Matthew Buddie | DHS FEMA Region VIII |
| Thomas Browning | Atkins |
| Susan Brown | Valerian |
| Robyn Brown | City of Arvada |
| Haden Brown | Nilex, Inc |
| Cameron Brown | AbTech Industries |
| Becky Brock | Brierley Associates |
| Jeff Brislawn | Wood |
| Karen Brigman | Highland Development Services |
| Sandra Bratlie | City of Fort Collins |
| Dawn Brabenec | DHS FEMA Region VIII |