He was born among the
Somboba people, one of seven children (with five sisters and a brother), the son of the clan's specially trained and initiated master of traditional dances. He learnt to dance in turn, and "had become a leader of the dance [...] before he started school", which he did in 1934, at an Anglican
mission school. He was
baptised and given the name "George" the following year. He subsequently became a teacher at All Souls school in
Gona, then, in February 1942, attended St Aidan’s College at
Dogura in
Milne Bay, to train to become a "teacher-evangelist". In July 1942, the
Second World War came to Papua in the form of a
Japanese invasion. The college remained open, despite being close to the fighting, and Ambo remained there throughout the war. In 1945, he returned to Gona, his home village, as a parish teacher. In the latter capacity, he taught the people of Gona to maintain most of their customs, including traditional dances and what he called "good traditional stories", but also to embrace Christianity and reject their "belief in witchcraft and sorcery". He taught the stories of the
Bible through "traditional dancing, singing, drumming and miming". ==Ministry==