Professional Engineers Ontario also known as PEO is the regulatory body for engineering in the province of Ontario, Canada. It ensures that professional engineers are properly educated, trained, and equipped to provide safe and effective engineering services to the general public. PEO has the power to investigate and discipline its members if they violate the regulations or code of ethics. The role of PEO is significant for maintaining the high standards of engineering in Ontario and ensuring public safety.

It is one of the largest engineering regulatory bodies in Canada. Its mission is to regulate and advance the practice of engineering to protect the public interest. The organization establishes and maintains engineering standards, regulates engineering practice, investigates complaints against engineers, and disciplines those who violate its regulations.
Since its establishment, it has played a vital role in ensuring the quality and safety of engineering practices throughout the province. It issues engineering licenses and certificates of authorization to qualified individuals as well as investigates complaints and enforces standards of professional conduct.
With more than 80,000 members, Professional Engineers Ontario is the second-largest engineering regulator in Canada. It ensures that engineers maintain high levels of professionalism and protect public safety.

Importance of PEO in the Engineering field
In the engineering field, Professional Engineers Ontario plays a critical role in ensuring public safety and the competence of engineers. For engineers practicing in the province, PEO provides licensing, regulation, and a code of ethics to guide their conduct professionally. Engineers who aspire to practice in Ontario must become licensed by PEO, which involves passing rigorous exams that demonstrate their competency. Apart from that, the organization also offers its members various resources and opportunities for continuing education to improve their skills and knowledge.