Professional Engineers Ontario licenses Ontario's 65,000 professional engineers, and sets standards for and regulates engineering practice in the province. It has a statutory mandate under the Professional Engineers Act to protect the public interest where engineering is concerned. Rigorously educated, experienced and committed to a Code of Ethics that puts the public interest first, licensed professional engineers can be identified by the P.Eng. after their names.
 
http://www.peo.on.ca/
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OAHI is the self-regulating professional body for home inspectors in the province. Under the Ontario Association of Home Inspectors Act (1994), OAHI has the exclusive right to define qualification requirements, regulate its members and grant the designation "Registered Home Inspector" and "RHI" to qualified practitioners in the Province of Ontario. The OAHI is dedicated to enhancing the technical skills and professional practice of home inspectors, and maintaining high professional standards through education and discipline. Originally formed in 1987, OAHI is now the CAHPI member in Ontario
 
http://www.oahi.com/
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CAHPI is a national association whose mission is to promote and develop the home inspection industry in Canada. It comprises seven provincial/regional organizations, collectively representing over 1,300 individual members. Formed in 1982, CAHPI is considered “the voice of Canada’s home inspection industry”.
 
http://www.cahpi.ca/