Hawaii wages read high on paper and get eaten by cost of living, so judge an offer by what it leaves you, not the hourly (see how states actually stack up). The real difference here is isolation: parts ship in, a bad compressor can idle a job for days, and techs who can improvise a repair rather than swap an assembly are worth more than their certifications suggest. EPA 608 is federal law and required anywhere you touch refrigerant; whether Hawaii adds a state license on top is worth checking against the state license requirements guide before you apply.
Hotel kitchens, walk-ins, ice machines, and chillers on in-house maintenance teams.
Blast freezing and low-temp storage tied to the Honolulu commercial fishing fleet.
Port-side warehousing that everything eaten on the islands passes through.
Base facility contracts where a military background and a clearance both help.
Nearly all of it is on Oahu, most of that in and around Honolulu. Neighbor-island roles exist on Maui and the Big Island but are thin and usually go to techs who already live there. Titles you will see: commercial refrigeration tech, industrial refrigeration tech, ammonia operator, and facility maintenance tech.
The hourly is competitive, but housing and groceries take it back, so the techs who come out ahead are the ones taking on-call and overtime. Read how on-call and overtime pay actually works before you accept a base rate.
Some, mostly at seafood processing and port cold storage rather than the sprawling food plants you would find on the mainland. RETA CARO or CIRO is a differentiator in a small applicant pool, not a checkbox most postings demand.
Only with a written offer in hand. The job pool is small and concentrated on Oahu, relocation costs are real, and employers here strongly prefer local hires who will not leave after one winter.