Thierry Décosterd was born in Vevey in 1978. While studying at the EPFL, he received the Banque Cantonale Vaudoise (BCV) Foundation Prize for the best studio project in 2002.
After receiving his Masters Degree in architecture, Thierry Décosterd joined the firm of Devanthéry and Lamunière in 2005. He has designed and completed numerous works, particularly in the fields of renovation and individual housing.
In 2015, Thierry Décosterd became an associate at the dl-c firm.