Professional Engineers of Ontario - PEO
- "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".

American Society of Heating, Refrigeration, and Air-Conditioning Engineers - ASHRAE
- "ASHRAE, the American Society of Heating, Refrigerating and Air-Conditioning Engineers is an international organization of 50,000 persons with chapters throughout the world. The Society is organized for the sole purpose of advancing the arts and sciences of heating, ventilation, air conditioning and refrigeration for the public's benefit through research, standards writing, continuing education and publications".

Ontario Association of Certified Engineering Technicians and Technologists - OACETT
- "OACETT is a non-profit, self-governing, professional association of approximately 20,000 members and a 42-year history of certification in Ontario. OACETT promotes the interests of engineering and applied science technicians and technologists in industry, educational institutions, the public and government".

Illuminating Engineering Society of North America - IESNA
- "The IESNA is the recognized technical authority on illumination. For over ninety years its objective has been to communicate information on all aspects of good lighting practice to its members, to the lighting community, and to consumers through a variety of programs, publications, and services".

Heating, Refrigeration, and Air-Conditioning Institute of Canada - HRAI
- "HRAI is a partnership of industry sector organizations that represents Heating, Ventilation, Air Conditioning and Refrigeration (HVACR) manufacturers, wholesalers and contractors who provide the Canadian public with products and services for indoor comfort and essential refrigeration processes".

Construction Specifications of Canada - CSC
- "Construction Specifications Canada (CSC) is a national association with chapters across Canada. CSC is a multi-disciplinary, non-profit association dedicated to the improvement of communication, contract documentation, and technical information in the construction industry".