Osaretin Afusat Demuren is the Chairman of GTBANK. She is the first woman to be in that position since GTBANK came into existence. She holds a Master of Science Degree in Economics and Statistics from the Moscow Institute of Economics and Statistics, Moscow, and a Diploma in Russian Language and Preliminary Studies from the Kiev State University, Kiev. She is a member of many professional associations including the Society for Human Resource Management of America, Nigerian Statistical Association, Chartered Institute of Personnel Management of Nigeria and the Chartered Institute of Bankers of Nigeria.
Osaretin is the mother of Segun Demuren, Banky W’s best pal and business partner. Tunde is married to popular OAP,Tolu Oniru ‘Toolz’.
Osaretin Demuren had a successful career with the Central Bank of Nigeria which spanned over 33 years, during which she served as Director, Trade and Exchange Department and was deployed to serve as the Director, Human Resource Department, a position which she held until her retirement from the Central Bank of Nigeria in December, 2009. She was the first female Director of the Central Bank of Nigeria.
Mrs. Demuren was at various times a Member and Secretary to the Public Enlightenment Committee on Second-tier Foreign Exchange Market, Representative of the Central Bank of Nigeria on Special Investigation Panel on Trade Malpractices of the Federal Ministry of Commerce and Tourism. She has served on the boards of several public institutions including the National Social Insurance Trust Fund (NSITF), Nigerian Investment Promotion Commission (NIPC), Nigeria Export Processing Zone Authority (NEPZA).
She was also the nominee of the CBN on the Governing Council of the Nigerian Investment Promotion Commission, nominee of the CBN on the Board of Nigerian Export Processing Zone Authority, Chairman International Technical Committee on the Comprehensive Import Supervision Scheme, Chairman Interministerial Technical Committee on the Nigerian Export Supervision Scheme, Member Presidential committee on the Review of the Pre-Shipment Inspection Scheme, Member residential Committee on the investigation of illegal siphoning of foreign exchange outside Nigeria, Member Presidential Committee on Trade Malpractices and the Co-coordinator on the implementation of Travelers Cheques accessibility to the Nigerian Public.
She currently sits on the board of Trust Fund Pensions Plc and of LAPO Microfinance Bank Limited.

She is an alumnus of several local and international training programs on Management, Banking, Finance, Trade and Investment at institutions such as the Michigan Ross Business School, Detroit and INSEAD Business School Fontainebleau, France.
Mrs. Demuren joined the Board of Guaranty Trust Bank plc in April, 2013. She served as a member of the Board Risk Management Committee from April 2013 and became the Chairman of the Committee in July, 2014. She was also a member of the Board Remuneration Committee and the Board Information Technology Strategy Committee.
She is married to Captain Harold Demuren, a former Director General of National Civil Aviation Authority.