Siegfried Casteleyn
Manager, Graduate Engineer (Technical University)
Study of Architecture at the Technical University of Berlin, "Diplom" degree in 1988
From 1990: freelance architect, main focus on building in existing contexts, covering all work stages of the Schedule of Services and Fees for Architects and Engineers (HOAI).
Hartmut Eichhorn
Manager, Graduate Engineer (Technical University)
Member of the Chamber of Architects Berlin
Study of Architecture at the Technical University of Berlin, "Diplom" degree in 1988
From 1990: freelance architect, covering all work stages of the Schedule of Services and Fees for Architects and Engineers (HOAI).