It´s a postal employee who carries and delivers mail, letters.
Postman
It´s a person who cuts hair
Hairdresser
It´s a person trained for space flight.
Astronaut
It´s a person who bakes, esp. one who makes and sells bread, cake, etc
Baker
It´s a member of a police force or body
Policeman/ Policewoman
It´s a person trained in the care of the sick.
Nurse
It´s a performer, who wears a funny costume and makeup, and acts to make people laugh in a circus
Clown
It´s a person who acts in stage plays, movies, etc
Actor/ Actress
It´s a person who dances professionally, as on the stage.
Dancer
It´s a person whose profession is the care and treatment of teeth
Dentist
It´s a person employed to extinguish or prevent fires.
Firefighter/ Fireman
It´s a person who drives a vehicle.
Bus driver/ Driver
It´s a person whose occupation is sailing or navigation, fishing.
Sailor
It´s a person who works in a restaurant carrying dishes or drinks.
Waiter/ Waitress
It´s a person who takes care of animals when they are sick.
Vet
It´s a person who practices the occupation or profession of journalism, writing in newspapers.
Journalist
It´s a person who cooks.
Cook