Ibiam was born in Unwana,
Afikpo,
Ebonyi State on 29 November 1906, of
Igbo background. He was the second son of Chief Ibiam, a native of Unwana. His father later became a traditional ruler,
Eze Ogo Isiala I of Unwana and Osuji of Uburu, in the
Nigerian chieftaincy system. He attended
Hope Waddell Training Institute,
Calabar, and King's College,
Lagos, and then was admitted to the
University of St. Andrews, graduating with a medical degree in 1934. He was accepted as a medical missionary of the
Church of Scotland, in which role he established
Abiriba hospital (1936–1945) and later superintended mission hospitals at Itu and Uburu. Ibiam was never ordained as a minister, but he was elected and ordained as an elder of the
Presbyterian Church. Ibiam was president of the
Christian Council of Nigeria (1955–1958). In 1957 he was appointed principal of Hope Waddell Institution. In the lead-up to Nigerian independence Ibiam served in local government, in the Eastern Regional House of Assembly, and in the Legislative and Executive Councils. After Nigeria gained independence in 1960, Ibiam was appointed governor of
Eastern Region. On 24 August 1962, he was appointed a Knight Commander of the
Order of St. Michael and St. George (KCMG). Ibiam held office until the military coup of 15 January 1966 that brought Major General
Johnson Aguiyi-Ironsi to power. ==Nigerian Civil War==