Check out www.sourcerefrigeration.com This company has 30 branches and 1000 employees mostly in the western states, they do mostly supermarket rack refrigeration and they recently opened a branch in Florida. Also check out www.reta.com www.nttinc.com www.rses.org also you have enough posts apply for pro membership there is a lot of training on this site for pro members! RETA is the Refrigeration Engineers and Technicians Association. These are the big Industrial Ammonia Guys.
Challenge yourself, take the CM test --- Certificate Member since 2004 ---Join RSES ---the HVAC/R training authority ---www.rses.org