Tos was CEO of Central Retailing, the group’s retail-development arm. In this role, Tos focused on international expansion. The company opened three department stores in China in 2010 and 2011.[3] They also made several key acquisitions in Europe, purchasing the Italian retailer La Rinascente in 2011[4] and the Illum department store in Copenhagen.[5] Tos Chirathivat also served under several executive director roles at Big C Super Center, Robinson department store, and B2S Company Ltd.