Olusegun Adejumo was born on the 30th day of September 1965 in Lagos. He studied art at the Yaba College of Technology, graduating with HND in painting in 1987.

He served as Assistant Lecturer in Painting at the Lagos State Polytechnic in 1987 and later worked as a Visualizer and illustrator at “Advertising Techniques Limited from 1991 to 1992, Segun co-ordinated The Young Masters Art Trust. Presently, he is a full time painter and illustrator with his studio in Lagos.