Since 1982 has been principal of an architectural firm in Zurich with Elisabeth Boesch. Has built works in Switzerland, Germany, Japan and Hong Kong. Among the most important projects: restructuring and renewal of Amtshaus III in Zurich; Maag-Areal in Zurich, with Diener & Diener; Pavilion Oui! Expo 02 in Yverdon; Areal Sulzer-Lagerplatz in Winterthur; renovation and extension to Villa Rainhof in Zurich; restructuring and extension to Kurtheater in Baden. Has taught Reuse at the Institutes of Technology in Lausanne and Zurich, the Institute of Architecture in Geneva, the Higher School of Visual Arts and the HafenCity University of Hamburg.