A person who fights fire is called a fire fighter.
firefighter
starter
a pacifist
An environmental activist.
A person who puts out fires is typically called a firefighter.
A person who gives a statement is called a witness.
a postman
A mentor
Witness
A Jerk
A Guidance Counselor.
An employer is the person who gives an employee a job.
A person who gives testimony can be referred to in different ways, depending on the circumstances. For examples:A Preacher or religious person gives (their) testimony.A court witness or defendant gives testimony.