Below is a current list of registrants.
| Full Name | Company |
|---|---|
| Brian Murphy | Otak, Inc. |
| Jake Moyer | City of Westminster |
| Ross Mower | Colorado School of Mines / City and County of Denver |
| Sean Morton | Vortex Engineering |
| David Morrisey | City and County of Denver |
| Dana Morris | Urban Drainage and Flood Control District |
| Ellie Montoya | Point Consulting LLC |
| Kevin Monaweck | City of Denver Wastewater |
| Amanullah Mommandi | Colorado Dept of Transportation |
| Darren Mollendor | City of Denver Wastewater |
| Geoff Mok | Contech Engineered Solutions LLC |
| Mark Miller | AquaShield, Inc. |
| Andrew Midwood | Murraysmith, Inc. |
| Jaclyn Michaelson | ICON Engineering, Inc. |
| Ian Mestdagh | ECI Site Construction |
| Jason Messamer | Colorado Springs Utilities |
| Josh Meck | City of Boulder |
| Rick McLaughlin | Merrick |
| Aaron McKelvey | La Plata County |
| Matt McGlone | CDM Smith |
| Dana McGlone | Dewberry |
| Chris McFarland | Calibre Engineering |
| Heather McDowell | City of Fort Collins |
| Bill McCormick | Colorado Division of Water Resources |
| Joe McCleary | City of Aurora - Aurora Water |
| Nathan Mayor | City of Boulder |
| Ken Matthews | Merrick |
| Dale Mathison | Ayres Associates |
| Maggie Mathis | Dewberry |
| Jason Margraf | J3 Engineering Consultants, Inc. |
| David Mallory | Western Light Consulting Services |
| Scott Mai | Mesa County |
| Morgan Lynch | Urban Drainage and Flood Control District |
| Drake Ludwig | Matrix Design Group |
| Mike Lozano | City of Boulder |
| Cynthia Love | SEMSWA |
| John Loranger | Wood |
| Michael Lopes | Calibre Engineering |
| April Long | City of Aspen |
| Daniel Loewen | Loewen Engineering, Inc |
| Suping (Sue) Liu | Arapahoe County |
| Ben Liu | Matrix Design Group |
| James Lindsay | Michael Baker International |
| Dane Liljestrand | Wood |
| Kevin Lewis | City of Denver Wastewater |
| Mike Lesser | Contech Engineered Solutions LLC |
| Eric Lessard | City of Loveland |
| Alan Leak | Respec |
| Lisa Lauver | Stantec Consulting |
| Duane Launder | City of Aurora |