Afari-Gyan worked as a lecturer and a professor of Political Science at the University of Ghana. He has also lectured in the United States and
Nigeria. He was a member of the Committee of Experts that drafted the Fourth Republican Constitution for Ghana. In 1992, he was appointed deputy chairman of the Interim National Electoral Commission by the
Provisional National Defence Council, which was ruling as a military
junta, with the hope of returning the country to civilian rule. His job was to ensure that the
November 1992 presidential election and the
December 1992 parliamentary elections were free and fair.
Jerry John Rawlings, the chairman of the PNDC, who was also
Head of State, stood and won the elections. In the last of these, unofficial institutions attempted to declare the results of these elections, with Afari-Gyan stating that these results could not be trusted. The 2004 general elections were disputed in court by the opposition National Democratic Congress. But the case was lost on technicalities. Again, the 2012 presidential election between President John Dramani Mahama and Nana Akufo-Addo ended up in an 8-month election petition trial at the Supreme Court. The opposition leader lost the case in a 5:4 split decision, which held that the President was validly elected. But, the trial, which was live on television, exposed some fundamental weaknesses in Ghana's electoral process, triggering calls and moves towards comprehensive electoral reforms before the 2016 general elections. The ruling has been heavily criticised by jurists. This is what one of the Supreme Court Justices, Justice
Jones Dotse, had to say about Dr Afari Gyan: "My observation is that, Dr. Afari Gyan appeared to have concentrated his oversight responsibility at the top notch of the election administration, thereby abdicating his supervisory role at the grassroots or bottom, where most of the activities critical to the conduct of elections are performed. In this instance, he even appeared not to be conversant with some of the basic procedural steps and rules that are performed by his so-called temporary staff. So far as I am concerned, Dr. Afari Gyan has cut a very poor figure of himself, and the much acclaimed competent election administrator both nationally and internationally has evaporated into thin air once his portfolio has come under the close scrutiny of the Courts." In 1998, he became the Executive Secretary of the
Association of African Election Authorities. He was also a member of a committee of experts who advised Nigeria on elections. He retired as Chairman of the Electoral Commission in June 2015. ==Honours==