What does Human Resources Department do? Hiring, firing, training, insurances, benefits, retirement planes, salary, vacation.
They take care of a lot of things. Yes.
But most of time, they provide assistances. What do you mean?
Say if the Engineering Department wants to hire a person, they will request HR to find candidates. Yes?
The Engineering Manager and his team will interview the candidates. HR will also be involved with the interview, but basically arranging the schedule and explaining the benefits.
OK. Then the Engineering Manager will choose the candidate.