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Ontario professional engineers are part of a community of more than 80,000 PEO licence and certificate holders committed to enhancing the quality of life, safety and well-being in the province. The P.Eng. designation represents high standards of engineering knowledge, experience and professionalism. To become a professional engineer in Ontario, you must be licensed by Professional Engineers Ontario (PEO).

For more than 90 years, PEO has governed its licence and certificate holders and regulated professional engineering practice to serve and protect the public of the province. Under the Professional Engineers Act, PEO establishes the educational, experience and other requirements for licensing, and disciplines licence and certificate holders who fail to maintain the expected standards of practice. PEO also raises public awareness of its role and of engineering as a licensed profession. Only a PEO licence holder can take responsibility for professional engineering work in Ontario; only a PEO Certificate of Authorization holder can offer or provide engineering services to the public.