[2] Nkambo Mugerwa attended King's College Budo for secondary school, and then went to Makerere University, where he got his undergraduate degree.
[4] Peter James Nkambo Mugerwa began his career in London, England, by working for Standard Vacuum Oil Company from 1956 to 1957.
[7][8] In 1973, Idi Amin fired his Minister of Justice and Constitutional Affairs of Uganda, Peter James Nkambo Mugerwa, with the stated reason being that he could not keep up with the "supersonic speed" that President Idi Amin was driving the economy, leading him to appoint Godfrey Serunkuma Lule to be his successor.
[9] He also reentered public life when Kabaka Ronald Mutebi appointed Nkambo Mugerwa to be the chairman of the Buganda Land Board, taking over for James Mulwana who had to resign after an "operation weakened" him.
[10] He oversaw a 13-person board, including Prince David Kintu Wassajja, Kabaka Mutebi's younger brother, the Luweero district chairman, Hajji Nadduli Kibaale and Martin Kasekende, the managing director of National Housing and Construction Company.