Diener & Diener Architects have been a joint-stock company (AG) since 2002, with registered offices in Basel and Berlin and, currently, a staff of 45. Roger Diener, born in 1950, established the firm of Diener & Diener in 1980, continuing the firm established in 1948 by his father, Marcus Diener. Roger Diener has been teaching at the Swiss Federal Polytechnic (ETH Zurich), ETH Studio Basel: Contemporary City Institute, since 1999. In 2002, the Académie Française awarded him its Architecture Award for his oeuvre.

Internationally known works include a block for athletes at the Olympic Village in Turin, Italy (2006), the Teachers’ Training Centre at the University of Malmö, Sweden (2005), the Forum 3 Novartis Campus in Basel, Switzerland (2005), the Swiss Embassy in Berlin, Germany (2000), residential buildings on Java Island Amsterdam, the Netherlands (2000), Hotel Schweizerhof and Migros in Lucerne, Switzerland (2000), CentrePasquArt, an art museum in Bienne, Switzerland, (1999), and the Warteck Brewery residential buildings in Basel, Switzerland (1996).

His current projects include: an extension of the Museum of Natural Science of Humboldt University in Berlin, Germany (-2009), residential and office buildings for Ville de Boulogne Billancourt, France (-2008), the City Park office buildings in Basel, Switzerland (-2010), the Kattendijkdok residential buildings in Antwerp, Belgium (-2008), the Musée de la Shoah in Drancy, France (-2010), the Park Residence on the Belvedere site, Cantonal Hospital of Zug, Switzerland (-2010), the Mobimo Tower on the Maag site in Zurich, Switzerland (-2010), and the Market Hall Tower in Basel, Switzerland (-2010).