What was Pavel's previous occupation before coming to the concentration camp?

In Chapter 7, Bruno falls from a tire swing, and Pavel rushes out of the house to help him. Pavel carries Bruno inside and cleans the wound on Bruno's knee. Pavel assures Bruno that he will be okay and puts a bandage over his cut. Bruno then comments to Pavel that his mother might want to take him to the doctor just in case. Again, Pavel assures Bruno that he will be alright. Bruno doesn't believe Pavel and says, "You're not a doctor" (Boyne 82). Pavel responds by saying, "Yes I am" (Boyne 82). Bruno does not understand how Pavel can be both a waiter and a doctor, but Pavel insists that he was a doctor. Bruno is naive and does not understand that Pavel was a doctor before he came to the concentration camp. Bruno then asks Pavel why he is peeling vegetables when he should be working in a hospital. Pavel tells Bruno that before he came to "Out-With" he practiced as a doctor. Before Pavel can begin to elaborate on his past life, Bruno's mother walks in the kitchen and their conversation ends.