Our Varsity teams compete as a member of Interscholastic Association of Southeast Asian Schools (IASAS) along with Taipei American School (TAS), International School of Kuala Lumpur (ISKL), International School Manila (ISM), Jakarta Intercultural School (JIS), and Singapore American School (SAS). Athletes are expected to travel internationally with their teams to the IASAS Exchange and the IASAS Championship.

JV and Varsity teams also compete in the Bangkok Metropolitan Athletic Conference. This athletic conference consists of international schools in and around the greater Bangkok area. Competition is arranged between member schools by age levels. The culminating activity for each season is a tournament hosted by one of the BMAC schools.