LicensingAtlas is an independent reference that answers one question well: how do you get licensed or certified for a given occupation in a given US state?

For each occupation and state, we document the issuing board, license types, requirements, exams, fees, renewal cycles, continuing-education hours, and reciprocity — drawn directly from official sources and dated so you know the information is current. Our approach is described in full on the methodology page.

Why this site exists

LicensingAtlas began with tools in hand, not with a content plan. The people behind this site do hands-on mechanical work themselves — flare fittings, manifold gauges, refrigerant circuits — and that kind of work raises the same question before any wrench turns: what does the law actually require, and which credential covers it? The answer turned out to be scattered across fifty-one jurisdictions and dozens of boards, buried in statutes and fee schedules that change without notice.

So we built the reference we wanted to use: every requirement stated in the issuing authority’s own words, dated, re-verified on a schedule, and corrected in public when we get something wrong.

Ice formed on the suction service valve of an R-32 mini-split condenser
Ice on the suction service valve of an R-32 condenser. The photographs on this site are our own, taken doing the work — not licensed from a stock library. Original photograph.

Independent and editorial

LicensingAtlas is published under an editorial voice rather than a personal byline. It is not affiliated with any licensing board, training provider, or government agency. When a requirement can be met through a course or exam-prep provider, we may link one as a step, with clear disclosure — but we do not rank, review, or recommend courses, and we do not generate or sell leads.

We state what states require, categorically and from official sources. LicensingAtlas is a reference, not legal or career advice, and requirements change frequently. Always confirm details with the issuing board before acting.

Contact

Questions or a correction? See the contact page .