Willi Frei has over 40 years of experience in architectural practice in Switzerland and internationally. He is a co-founder of Bauart, which is one of Switzerland’s largest architectural agencies, renowned for its achievements in the field of energy-efficient sustainable buildings. He has also worked on the design of the Federal Office for Statistics in Neuchatel, the Marin low-energy commercial centre, and the Ecoparc in Neuchâtel, all of which showcase energy-efficient and innovative applications for high-performance modern buildings.