Mirchev graduated in Wood Carving at the Applied Arts College Dimitar Dobrovich in Sliven, Bulgaria, where he got his artist name Duna. His artistic career as a sculptor started in 1989 as he took part in the Annual National Exhibition of Applied Arts in Bulgaria. Since then, he has been working as a sculptor and professional artist. Daniel is a member of the National Association of the Bulgarian Professional Artists. He is an associate member of the art group Nine, consisting of sculptors dedicated to wood. Being an independent artist, over the years he has also played an important role in graphic design projects, as well as set designing for movies, TV shows and commercials.
Mirchev has had several solo shows and has participated in numerous group exhibitions as well as woodcarving symposiums. His sculptures and art installations have been treasured by a highly international audience, and they are currently part of private collections in Belgium, UK, Germany, France, Italy, Spain, Canada and the United States.
Mirchev is officially represented by Macadam Gallery in Europe.