On 14 September 1945, the school made a proposition to Major Pollett, a member of the British Borneo Civil Affairs Unit (BBCA.U) to reopen Saint Columba's School. The proposal was approved and on 17 September 1945 the school was reopened with only two teachers, namely Liew Kit Siong and Molly Leong and 41 students. They were assisted by one untrained teacher.