Dominik Hafen, born in 1967, is a trained graphic designer. He teaches in Ravensburg and St. Gallen. Bernhard Senn, born in 1965, is a trained textile designer. Roland Stieger, born in 1970, is a trained typesetter. He studied CAS Type Design with Hans-Jürg Hunziker and André Baldiger at the ZHdK, teaches in St. Gallen, and holds workshops. All three participated in a further training course for typographers from 1990 to 1992, and went to found their studio TGG Hafen Senn Stieger in 1993.