A little change in my job

The (Not necessary) last tuesday my boss explained to me that I will do new labors (have to take up new responsibilities) in my job. I work in a company that develops a program to value (evaluates) de (the) damage in (to) the cars after a collision. I'm from the department of painting (<or maybe> I work in the paint shop), and now I'm going to develop the area of engines, gearbox and other parts of the vehicles. I don't know if this change is good or not. I have a little doubt, but my boss says that it is a good thing for me and for my career in the company. So I have to think like him.