Like any other field Dubbing Industry is a flourishing and well paid industry and also sustaining for long period of time. Here your are not bound to a particular company or agency or organization.
Mumbai has many different languages speaking artist from all over india as well as world. Some of the languages dubbed are Hindi, English, Tamil, Telugu, Bengali, Assamese etc.
Many Tvc's, cartoons, movies, documentaries etc are dubbed from one language to other. Becoming a Dubbing artist is not an easy task it needs determination as well as practice.