All good wardrobe assistants & prep costumers no matter what department or industry should bring to the job some useful skills. Wardrobe Assistants are often hired on a full time or part time basis for general purposes. Be it in a union, non-union, theatre, T.V., film or commercial environment. It’s important to realize that wardrobe assistants & prep costumers are a very important piece of the pie and a strong, positive work ethic is vital if you are going to be a successful assistant and be asked back.