Building Custodian.
A person who takes care of building a school is typically referred to as a contractor.
a person who rides elephants is called a mahout
A person who takes care of fish is called an "aquarist" or a "fishkeeper." They are responsible for maintaining the health and well-being of the fish in their care by ensuring they have a suitable environment, feeding them properly, and monitoring their behavior.
Mama is a person that gave birth to you or the person that takes care of you. Some people call mama as a different name like mommy, mother or mum.
A person who looks after sheep is typically called a shepherd. They are responsible for the care, feeding, and protection of the sheep in their flock.
childcarer
traffic trigger
doctors
Grounds keepers
Farmer or bison rancher.
Life guard
This is a manicurist.
The general name for that field is gerontology.
A parent/guardian
I would call them an aspiring veterinary nurse or an aspiring veterinary surgeon.
A house maker is someone who stays at home and takes care of things there like cooking dinner and cleaning the house.
Someone who takes care of animals would be a Veterinarian. It could also be a farmer, or a zoologist. Even an animal trainer.