| Full Name | Company |
|---|---|
| Harold Lindstrom | Thunder Bay Construction Association |
| Rachael Lolua | Mechanical Contractors Association Hamilton Niagara |
| Brad Longeway | Carpenters Regional Council |
| Jim Lyons | Windsor Construction Association |
| Gazi Maashrur | Hammer Heads |
| Colin Macdonald | Altus Group |
| Filipe Machado | Carpenters Local 27 |
| Brandon MacKinnon | LiUNA Local 1059 |
| Wendy MacNeil | EllisDon |
| Sabri Mahdi | Hammer Heads |
| Andy Mallon | Classic Fire + Life Safety |
| John Mandarino | LiUNA Canadian Tri-Fund |
| Jose Manso | Sheet Metal Workers & Roofers Local 30 |
| Alexis Mantello-Clement | EllisDon |
| Joe Marcello | IBEW Local 353 |
| Don Marks | Ontario Industrial Roofing Contractors Association |
| Drew Marks | International Union of Elevator Constructors |
| Noel Marsella | AGMCA Glaziers |
| David Martell | UA Local 46 |
| Cheyenne Martin | Prism Economics and Analysis |
| Dave Martin | Brick and Allied Craft Union Of Canada Local 1 |
| Lindsay Maskell | Ironworkers |
| Fabrizzio Massari | LiUNA Local 506 |
| Spencer Maves | E.S. Fox Limited |
| Fin McCallum | Black & McDonald Limited - Toronto, ON |
| Craig McCarten | Skilled Trades Ontario |
| Howard McFadden | IBEW Local 353 |
| Mike McGarragan | Milestone Environmental Contracting Inc |
| Duncan McIntosh | Millwright Regional Council |
| Zak McIsaac | McCain Capital Partners |
| Heather McMillan | Durham Workforce Authority |
| Scott McQueen | SMART Sheet Metal Air Rail Transportation |
| Andy McVey | IBEW Local 353 |
| Adam Melnick | International Association of Heat and Frost Insulators |
| Kevin Middlestadt | UA Local 853 Sprinkler Fitters of Ontario |
| Romeo Milano | Council of Ontario Construction Associations |
| Adam Millman | LiUNA Local 1059 |
| Jacques Mineault | Boilermakers Local 128 |
| Jessica Moniz | SGS CANADA |
| Nathan Moniz | LiUNA Local 1059 |
| Cameron Moore | EPSCA |
| Scott Morrison | UA Local 46 |
| Leslie Mullaly | Boilermaker Contractors' Association |
| Stirling Munn | Boilermakers Local 128 |
| Bill Munns | M&G Steel Limited |
| Shyheim Murray | Hammer Heads |
| Mark Nagus | Bruce Power |
| Josh Neville | Carpenters Local 397 |
| Mike Noble | Carpenters Local 27 |
| Greg O'Brien | Boilermakers Local 128 |