Educated at University of Ife (now Obafemi Awolowo University, Ile-Ife), the University of Ibadan and the Nigerian Law School. He commenced legal practice in 1991 as an Associate in the Chambers of Messrs Ayanlaja, Adesanya & Co., a leading law partnership with composite expertise in corporate law practice and litigation.

Mr. Koya is involved in general corporate and commercial practice with emphasis on corporate formation and restructuring, capital raise through public issue of shares and debentures and private equity, international commercial negotiations and contractual dealings, banking and secured credit transactions, equipment leasing, communications law, laws regarding corporate investment in Nigeria, Insolvency law and practice, legal counseling on financial/fiscal related legislation. He has also been involved in several capital market transactions.