Below is a current list of registrants.
| Full Name | Company |
|---|---|
| E. John Loranger | Wood |
| Cynthia Love | SEMSWA |
| Drake Ludwig | Wright Water Engineers |
| Morgan Lynch | Mile High Flood District |
| Joseph Machala | CDM Smith |
| Rocky Macsalka | AECOM |
| Bennet Madigan | Matrix Design Group |
| Doug Mahan | Colorado Water Conservation Board |
| Angelica Makuch | HDR |
| Brenden Marron | City & County of Denver Public Works |
| Leylin Marroquin | AECOM |
| Michelle Martin | Anderson Consulting Engineers, Inc. |
| Maggie Mathis | Dewberry |
| Dale Mathison | Ayres Associates |
| Jake Maybach | RS&H |
| Brian McCormick | Colorado Springs Utilities |
| Heather McDaniel | Souder Miller & Associates |
| James McEwen | Adler Tank Rentals |
| Chris McFarland | HR Green, Inc. |
| JP McFarren | Muller Engineering Company |
| Aaron McKelvey | La Plata County |
| Richard McLaughlin | Merrick & Company |
| Nicholas McMurtrey | Murraysmith |
| Patrick McNeirney | HDR |
| Saman Mehdi | WSP |
| Jason Messamer | Colorado Springs Utilities |
| Randy Mettlen | City of Brush! |
| Jaclyn Michaelsen | ICON Engineering, Inc. |
| Brennan Middleton | HDR |
| Bridget Mitchell | Pinyon Environmental, Inc. |
| Douglas Mize | Souder Miller & Associates |
| Dan Mogen | City of Fort Collins |
| Geoff Mok | Contech Engineered Solutions LLC |
| Amanullah Mommandi | Colorado DOT |
| Suzanne Moore | City of Greenwood Village |
| Josh Morin | City of Greenwood Village |
| David Morrisey | City & County of Denver Public Works |
| Caroline Morrison | Austin Civil Group, Inc. |
| Rick Moser | RESPEC |
| Jacob Moyer | City of Westminster |
| Kevin Muller | City of Boulder |
| Brian Murphy | Otak, Inc. |
| Lilly Murphy | Calibre Engineering |
| William Murphy | Bowman Construction Supply |
| Jerry Naranjo | Naranjo Civil Constructors, Inc. |
| Caleb Nelson | Calibre Engineering |
| Jon Nelson | SEMSWA |
| Jeni Nicovich | City of Durango |
| Jessica Nolle | RESPEC |
| Jason Nyberg | Quantum Spatial |