MECHANICAL CONTRACTORS ASSOCIATION ONTARIO

The unified voice of the mechanical contracting industry in Ontario.

WHAT IS THE MCAO

The Mechanical Contractors Association of Ontario (MCAO) is a provincial not-for-profit organization dedicated to advancing, promoting, and developing the mechanical contracting industry. Comprised of enthusiastic and devoted professionals, the MCAO strives to bring value and stability to approximately 300 members across the entire province of Ontario.


As an accredited bargaining agency with the Ontario Labour Relations Board, the Mechanical Contractors Association of Ontario represents all unionized mechanical contractors working in the province of Ontario. Our board of directors, comprised of volunteers from member companies, represent their respective zones and work to ensure our members’ interests are represented on all levels of government.


We are dedicated to offering exciting and evolving educational opportunities, business tools, and representation to members of all sizes. Our partnership with various government entities and other associations allows the MCAO to provide access to a wide variety of training programs, often covering the cost for our members to grow their knowledge.


The Mechanical Contractor’s Association of Ontario operates across the entire province and is broken down into fourteen zones, each with their own Mechanical Contractors Association. These zones operate independently of the MCAO and also offer a wide variety of benefits and resources to their respective members.

MCA Ontario 2025 Annual General Meeting/Conference

Riviera Maya, Mexico

JOIA Paraiso by Iberostar

January 30- February 6, 2025

7 nights all Inclusive JOIA Paraiso by Iberostar on the Riviera Maya

The MCAO/OPTC Provincial Collective Agreement

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