[1][2] Assensoh was born on 1 April 1946 at Dunkwa-On-Offin, Gold Coast to Opanin Kwabena and Abena Amoateng.
[4] He obtained his bachelor's degree in History and Politics from Dillard University in 1981.
[2][4] Assensoh begun as an assistant editor for the Daily Listener, Chronicle, and Digest in Monrovia, Liberia.
From 1970 to 1972, Assensoh worked as a syndicated columnist for Compass News Features in Luxembourg.
After his completing his doctoral research in 1984, Assensoh was appointed associate professor of History at Dillard University.