Ambidextrous
You would call them a loan officer.
They would be called nocturnal.
a dedicated worker
Tech Person
a slave
Employee
Assuming you mean ironing as in laundry, that would be either a presser or a laundress.
someone who works for a business
It's depend on what that person is working on. But I would call it a Laboratorist
A mathematician
hydrologist
moofer