Knowledge Centre

PEO publishes a variety of resources to assist licence holders in their roles and responsibilities, as well as guidance for applicants going through the licensure process.


Ontario professional engineers are part of a community of more than 87,500 PEO licence and certificate holders committed to enhancing the quality of life, safety and well-being in the province.

PEO’s Engineering Intern (EIT) program provides guidance and assistance to engineering graduates as they acquire the 48 months of acceptable engineering work experience, including annual reviews of experience.

As the regulator of engineering in Ontario, it’s PEO’s role to assure the public that licensed practitioners are competent to practise in their chosen discipline, and that they are taking responsibility for the outcomes of their work.

As Ontario’s engineering regulator, PEO relies heavily on its volunteers. More than 1,000 professional engineers, engineering interns and non-engineers volunteer their time each year on behalf of the association through their participation.

PEO's mandate, as described in the Professional Engineers Act, is to ensure that the public is protected and that individuals and companies providing engineering services uphold a strict code of professional ethics and conduct.

Online Learning Modules

PEO’s Online Learning Modules provide licence holders, volunteers, staff and applicants with various learning and development opportunities.

Practice Advice Resources and Guidelines

PEO offers a variety of practice advice resources to assist licence holders in providing professional and ethical engineering services.

Frequently Asked Questions

PEO does not have any affiliation with the iron ring. The iron ring is associated with the Ritual of the Calling of an Engineer and is administered to engineering students upon graduation at an Obligation Ceremony. You can find out more about the iron ring and how to obtain one by visiting

If a person uses the title “professional engineer”, or “engineer”, or any other occupational title that might lead to the belief that the person is qualified to practice professional engineering, or uses a seal that leads to the belief that the person is an engineer, PEO will prosecute the matter through provincial court. Fines for people found guilty can range from $10,000 for a first offence, to $50,000 for repeat offences.

PEO has the power to discipline professional engineers found guilty of professional misconduct. The association can also take action against unlicensed individuals who illegally describe themselves as engineers. Similarly, the association can prosecute companies or entities that illegally offer or provide engineering services to the public. PEO may hold a hearing, which works much like a court case: PEO is the prosecutor; the engineer is the defendant; the PEO Discipline Committee is judge and jury. If the Discipline Committee finds the engineer guilty, it imposes a penalty. The penalty might involve revocation or suspension of the license, payment of a fine and/or publishing of the licensee’s name in PEO’s official journal. Publishing of the licensee’s name is mandatory if the license is revoked or suspended.

Obligations of one engineer to another are described in the Code of Ethics, Section 77 of Regulation 941. Peer review is covered in subsection 77(7) (ii) which states that a practitioner shall "not accept an engagement to review the work of another practitioner for the same employer except with the knowledge of the other practitioner or except where the connection of the other practitioner with the work has been terminated". In other words, if the P. Eng. who did the work is still involved with the project, the reviewing engineer must inform the first engineer that his or her work is being reviewed. It is best to do this in writing. For more information, please see the guideline: Professional Engineers Reviewing Work Prepared by Another Professional Engineer

If you were not an owner of the consulting firm then you do not need to keep drawings or other documents. In fact, you should return those you do have to the firm or ask their permission if you want to keep some documents. Generally, since you were an employee, you do not have any contractual obligations to previous clients. For instance, you do not need to answer questions about ongoing or past projects. You can provide assistance if you wish and if it is compatible with legal and ethical obligations to your past employer. Your professional obligations to the client, however, continue even after leaving employment.

No. Upon graduation, you may call yourself an engineering graduate, not an engineer.

The iron ring is associated with the Ritual of the Calling of an Engineer and is administered to engineering students upon graduation at an Obligation Ceremony. PEO does not have any affiliation with the iron ring. You can find out more about the iron ring and how to obtain one by visiting

The Ontario Society of Professional Engineers (OSPE) is a member-interest advocacy body whose mandate is to advance the professional and economic interests of professional engineers in Ontario, and to look after non-regulatory matters for the profession. OSPE was created as a legal entity in April 2000 with the support of PEO and the Ontario Ministry of the Attorney General, the arm of government with the responsibility for regulating engineering in this province.

OSPE seeks to:

  • advance the professional and economic interests of professional engineers;
  • raise awareness of the role of professional engineers;
  • enhance the profession’s image;
  • and act as a strong voice on behalf of professional engineers in Ontario.

You can find our more about OSPE on their website.

You can search for all licence holders, holders of the certificate of authorization and consulting engineers using PEO's directory.

If you have concerns about either the work of an engineer, or suspect that a person or a company is practicing engineering and may not be licensed, you can contact PEO's Enforcement Hotline at: 416-224-9528 ext.1444 or 1-800-339-3716 ext. 1444.

Engineers may be engaged as consultants or as employees.

PEO's Guideline for the Selection of Engineering Services offers selection processes that can be used when choosing a professional engineer. The term "Consultant," or "Consulting Engineer," applied in connection with providing professional engineering services, requires that the person using the term be authorized to do so by PEO. 

When hiring an employee engineer, the employer may find the Ontario Society of Professional Engineers (OSPE) Employer Salary Survey helpful. In addition to listing salaries by field of specialization, year of graduation and type of work, the surveys also provide details about other forms of compensation and about benefits.

The March/April 2001 issue of Engineering Dimensions was also devoted to this subject.

Professional engineers are:

  • well educated, especially in applied sciences;
  • tested by their peers before they are licensed;
  • required to have at least five years of experience after graduation (a total of at least nine years of education and experience) before providing services directly to the public;
  • policed by their peers;
  • prepared to apply the best, up-to-date technology in an environmentally sustainable and cost-effective way to benefit society's evolving needs;
  • responsible for safeguarding life, health and public welfare; and
  • qualified to design and supervise the creation of many things today's society needs at work, rest and play.

Certain work must be completed or approved by a professional engineer, for example, engineering drawings, which require sign-off.

Ultimate responsibility for engineering work requires a professional engineer. While research, testing and drawing may be delegated to others, only the professional engineer can take responsibility for engineering work that affects public health and safety.

Professional engineers are qualified practitioners who can help you:

  • turn your ideas and concepts into successful working projects/products/services;
  • reduce your costs and save money;
  • protect the environment and public safety;
  • maximize productivity and opportunities; and
  • overcome or minimize limitations.

They can help you to incorporate your ideas into something of real value in the real world.