	Mahama went back to Nalerigu as a medical doctor in September 1973 and four years later, he left Ghana to become an Obstetrics and Gynecology Physician in Chicago, Illinois. During this period, he was also a Clinical Instructor at Northwestern University. In 1990, Mahama was appointed a lecturer at the University of Ghana Medical School and consultant at Accra's Korle Bu Teaching Hospital. He was elected a fellow of the West African College of Surgeons in 1994.