Born in Switzerland, he studied architecture at ETH in Zürich and started working with Piano & Rogers on the Pompidou Center. Since then, he has continued to work with Renzo Piano in the Paris office, and became a partner in 1989. A sampling of his notable projects includes: the Beyeler Foundation Museum in Basel, the reconstruction of the Potsdamer Platz area in Berlin, the Zentrum Paul Klee in Bern, the Rue de Meaux Housing in Paris, and the New York Times Building. He also oversaw the construction of the Pathé Foundation in Paris.