How do I register as a technical official in Canada?

Basic registration has four steps, according to Triathlon Canada:

1. Register as a Technical Official with your provincial sport organization (PSO). The list of PSOs is at https://www.triathloncanada.com/about/provincial-sport-organizations/
2. Complete an Enhanced Police Information Check (E-PIC).
3. Complete the "CAC Respect in Sport" training.
4. Complete the "Making Headway in Sport" concussion awareness training.

Completing basic registration and the Safe Sport requirements puts you on the national registry of registered officials. Triathlon Canada's publications page lists a Basic Registration for Technical Officials document and an Officiating Pathway infographic: https://www.triathloncanada.com/publications/

Source: https://www.triathloncanada.com/officials/