Below is a current list of registrants.
| Full Name | Company |
|---|---|
| Jessica La Pierre | City of Aurora |
| Adam Lancaster | City of Canon City |
| Frans Lambrechtsen | Jacobs |
| Dean Lamanna | Triton Environmental |
| Tina Kurtz | Larimer County Engineering |
| Scott Kuhna | City of Boulder |
| Joe Kubala | Town of Lyons |
| Laura Kroeger | Urban Drainage and Flood Control District |
| Christopher Kroeger | Muller Engineering Company |
| Dave Krickbaum | Olsson Associates |
| Robert Krehbiel | Matrix Design Group |
| Matt Kozakowski | City of Aurora |
| Dave Kotz | SGM |
| Catherine Kornbrust | BT Construction, Inc. |
| Greg Koch | Anderson Consulting Engineers, Inc. |
| Chris Knott | BT Construction, Inc. |
| Matt Knight | City of Arvada |
| Jack Knaub | Hanes Geo Components |
| Katie Knapp | City of Boulder |
| Daniel Knapp | Anthem Structural Engineering |
| Kevin Klimek | AECOM |
| Kate Klavon | WSP |
| Laura Kindt | AECOM |
| Tania Kilcullen | City of Aurora |
| Kelsey Kijowski | City and County of Denver |
| Jonathan Kelly | Wright Water Engineers |
| Madeline Kelley | Colorado Water Conservation Board |
| Kyle Keaffaber | Oldcastle Precast - Stormwater |
| Cassie Kaslon | Valerian |
| Brent Kaslon | Valerian |
| Jim Kaiser | City of Thornton |
| britni kahler | SEMSWA |
| Will Johnson | City of Boulder |
| Sara Johnson | Muller Engineering Company |
| Matthew Johnson | HDR |
| Eric Jansen | City of Gunnison |
| Jacob James | Town of Parker |
| Celeste Jain | HR Green, Inc. |
| Ajay Jain | HR Green, Inc. |
| Katie Jagt | Watershed Science And Design |
| Craig Jacobson | ICON Engineering, Inc. |
| Robert Jacobs | Summit County Government |
| Don Jacobs | Enginuity Engineering Solutions |
| Chris Ide | Wood |
| Michelle Iblings | Tetra Tech |
| Janice Huson | Wood |
| Susan Hurd | City of Aurora |
| Angela Howard | SEMSWA |
| Kristine House | HR Green, Inc. |
| Sarah Houghland | Enginuity Engineering Solutions |