A lot of them might cross paths with other non-exotic small mammals, like dogs... Behaviourist, nutritionist, vet, vet tech, pet sitting, pet photography, shelter/rescue/humane society work, groomer.
Other things that may involve work around cats, though not necessarily careers, may be breeding, showing, and crafting. If you're handy, you can build and create cat toys, towers, beds, etc. I know someone who briefly ran her own homemade pet treat business on the side. You could run or work in a cat cafe. More of those are springing up in North America.