I volunteer at the Audubon Zoo in New Orleans, LA. My job mostly involves cleaning tanks. I deal with reptiles and mammals. It's a lot of fun and I'm learning a lot through hands on experiences and osmosis.
Paid employees make starvation wages. They have a hard time hiring keepers because starting pay is $18k. Senior keepers make less than $30k. That's pretty meager wages even for Level 4 keepers.