Eberle enrolled at the Technische Universitat Wien as a student of architecture in 1973 and graduated under Anton Schweighofer in 1978. Having completed his studies, he spent years working in Teheran where he was involved in a town planning study and new town planning. One of a group of young architects who studied in Vienna in the 1970s, Eberle returned to Vorarlberg in the 1980s to carry out building projects there. He is one of the founding members of the Vorarlberg Architects. While still an undergraduate he teamed up with Markus Koch, Norbert Mittersteiner and Wolfgang Juen in 1979 to found the Cooperative Bau- und Planungsgesellschaft (1979-1982). The Im Fang project was the sign of 'a new, alternative building philosophy' and sent out an important signal at this time. 1982 saw the founding of the architectural practice of Eberle Egger. This was followed in 1985 by cooperation between Carlo Baumschlager and Dietmar Eberle in the architectural practice of Baumschlager Eberle. Launched in Vorarlberg, the practice is well established in Austria and now carries out projects in Europe and Asia.
Eberle has described the specific quality of the architecture aspired to by the practice as follows: 'Architecture involves abstracting the practical value onto a cultural plane. A space is thus opened up for the cultural positioning of architecture and for individual visions which go beyond the specific requirements of a building. The architect's responsibility lies in the considerable commitment of resources and the temporal dimension of the social impact of buildings and the urban fabric. Personal creativity does not relieve the architect of his responsibility towards society. The architectural practice Baumschlager Eberle is a network of international offices run by Dietmar Eberle together with eleven partners. The offices, located at twelve sites in eight different countries in Europe and Asia, have completed well over 400 buildings. Eberle has taught regularly at various universities since the 1980s. He has been a visiting professor inter alia in Hanover, Vienna, Linz, Syracuse (NY) and Darmstadt. In addition, he has taught in Madrid, Jerusalem, Hong Kong and Barcelona. Since 1999 Eberle has been a full Professor of Architecture and Design at the ETH Zurich and was in charge of the ETH Wohnforum up to 2015. He was head of the Department of Architecture from 2003 to 2006.