Below is a current list of registrants.
| Full Name | Company |
|---|---|
| Alex Ewers | 3 Rocks Engineering |
| Cameron Brown | AbTech Industries |
| Adrianna Lash | AbTech Industries |
| David Rausch | Adams County Public Works |
| James McEwen | Adler Tank Rentals |
| Peggy Graham | Advanced Drainage Systems |
| Jordan Ollanik | Advanced Drainage Systems |
| Evan Fischgrund | Advanced Drainage Systems |
| Rigel Rucker | AECOM |
| Kimberley Pirri | AECOM |
| John Sikora | AECOM |
| Griffin Cullen | AECOM |
| Tim Benenati | AECOM |
| Heather Pasch | AECOM |
| Jenna David | AECOM |
| Alejandro Riano | AECOM |
| Geoffrey Uhlemann | AECOM |
| David Center | AECOM |
| Laura Kindt | AECOM |
| Rocky Macsalka | AECOM |
| Leylin Marroquin | AECOM |
| Lindsey Freytag | AECOM |
| Joseph Roerkohl | AECOM |
| Jessica Barr | AECOM |
| Jorge Rodriguez | AECOM |
| Abigail Benenati | AECOM |
| John Giordanengo | AloTerra Restoration Services |
| Michelle Martin | Anderson Consulting Engineers, Inc. |
| Jason Albert | Anderson Consulting Engineers, Inc. |
| Greg Koch | Anderson Consulting Engineers, Inc. |
| John Santos | AquaShield, Inc. |
| Michael Welker | Ascent Geomatics |
| Thomas Browning | Atkins |
| Kenneth Robinson | Atkins |
| Michael Tanner | Atkins |
| Mark Austin | Austin Civil Group, Inc. |
| Scott Sorensen | Austin Civil Group, Inc. |
| Caroline Morrison | Austin Civil Group, Inc. |
| Dusty Robinson | Ayres Associates |
| Anthony Alvarado | Ayres Associates |
| Dale Mathison | Ayres Associates |
| Scott Zey | Ayres Associates |
| William deRosset | Ayres Associates |
| Keely Campbell | Ayres Associates |
| Shaojun Liu | Bai Engineers |
| Sloane Bullecks | Bienenstock Natural Playgrounds |
| Steve Carter | Bio Clean Environmental |
| Craig Hoover | Bohannan Huston, Inc. |
| Rifka Wine | Bohannan Huston, Inc. |
| Virginia Batts | Boulder County |