The Ontario Skilled Trades Alliance is composed of 37 organizations representing a variety of employers and their skilled trades employees. By working together, we are better positioned to achieve our goals and ensure that we have a say in government policies and decisions. 


OFA  The Ontario Formwork Association
OGCA – Ontario General Contractors Association
OHBA - Ontario Home Builders' Association
OHSA - Ontario Hair Stylists Association
Ontario Municipal Manufacturers & Distributors Committee
ORBA – Ontario Road Builders Association
OSWCA – Ontario Sewer & Watermain Construction Association
Ottawa Construction Association
Plumbing Heating and Cooling Contractors
Progressive Contractors Association
RESCON – Residential Construction Council of Ontario
Residential Low Rise Forming Contractors Association of Metropolitan Toronto and Vicinity
RFCA – Residential Framing Contractors Association of Metropolitan Toronto and Vicinity Inc.
RTCA - Residential Tile Contractors Association
Sarnia Heavy Construction Association
Simcoe County Heavy Construction Association
Timmins Construction Association
Trillium Automobile Dealers Association