Independent index. Not a government website.
What certification does the trade actually require?
Ontario prescribes 144 trades, makes 23 of them compulsory, attaches a certifying exam to 83 and an apprentice to journeyperson ratio to 33. This registry publishes a verified record for the 81 of them in the construction and industrial sectors, plus every TSSA fuel certificate and the ODP refrigerant card: what the law classifies each one as, how the certification works, and where the official sources are. Every classification fact is read directly from O. Reg. 876/21, never from a summary.
Browse all trade records, the list of compulsory trades in Ontario, or the TSSA fuel industry certificates, including the G.2 and G.3 gas technician records.
Ontario's largest trades by apprentices in training
Studying for a certifying exam?
We publish practice exam guides built to each trade's published Red Seal exam breakdown: the real question count, the real split across Major Work Activities, and the real mix of recall, application and problem-solving questions. Free sample questions with answers are on every product page.
Construction Electrician (309A) Practice Exam
$40 CAD
Free samples inside →
Industrial Mechanic Millwright (433A) Practice Exam
$40 CAD
Free samples inside →See every practice exam we publish
How this registry works
Each record answers the questions people actually ask: is the trade compulsory, is there an exam, is there a ratio, is it Red Seal, and how do you get certified. Facts we have not yet verified against a primary source are marked as not published rather than estimated, and every page carries a visible last verified date. Read more about the method on the about page.