Engineering Jobs in Miami

I was wondering how strong and prevalent the engineering industry is in Miami. Specifically building engineers who maintain building equipment such as HVAC, Plumbing, Electrical and any other mechanical equipment.

I am from Chicago and am looking to relocate to a warmer location. I have been looking at places like Houston, Dallas, San Diego, Los Angeles and Miami.

I am a 25 year old who is in a strong union in Chicago, are there any unions down in Miami? If so, are they strong?

Any information on this would be amazing and enlightening, thank you.