A scab.
A good employee!
co-worker.
A co-workerA employeeOr a person that works with you
a sanitation worker
A worker who makes something that people want to buy is called a producer. Sometimes this person is also called a supplier.
A case worker.
a social worker
That person is called an actuary.
It is called a social worker
A person who cleans the street is typically called a street cleaner or a sanitation worker.
A cattle farm worker is called a herdsman.
A worker.