Career
He became the Vice President of the Republic of Ghana between 1979 and 1981. De Graft-Johnson practised as an engineer in Ghana. He was also a lecturer at the Buildings and Roads Research Institute of the Kwame Nkrumah University of Science and Technology at Kumasi.
He later became the director
He was the President of the GhIE from 1977 to 1978. During the era of military rule under the Supreme Military Council, he was involved in opposition to continued military rule as he was then President of the GhIE, one of many professional bodies in Ghana opposing the military government.
He suffered personal attacks because of this. De Graft-Johnson joined the People"s National Party (PNP) when it was founded in 1979.
The government was overthrown by coup d"état on 31 December 1981.
He left for exile in London, England after the coup. He died on April 22, 1999 in London at the age of 65.
