In 1907, the Malaya Mission of Seventh-day Adventists started a Eastern Training School in a house called Mount Pleasant off Thomson Road. After relocating several times, the school was eventually rooted at 273 A Upper Serangoon Road. From 1921 to 1926, several buildings were completed to support the vision and expansion of the school. In 1929 and 1938, the name of the school was changed to Malayan Seminary of Seventh-day Adventists and Union Training School respectively. The school was closed from February 1942 to September 1945 due to the Japanese occupation during World War II. The school was reopened in October 1945. The school started to offer courses from Primary One to Senior Cambridge from 1948