Hon. Okello holds a Master’s degree in Business Administration – Eastern and Southern African Management Institute (ESAMI) (2021), having obtained a Degree (Hons) in Social Science at Makerere University in 1999, among other professional training. Before this appointment, Hon. Okello was a Member of the Presidential Advisory Committee on Budget (PACOB). Hon. Okello was a Member of Parliament of Uganda representing Kioga County (2011 -2021), and served as a Member of the Committee on National Economy from May 2011 to May 2021; Member of the Committee on Finance, Planning and Economic Development (May 2011 - May 2019); Vice Chairperson Committee on Finance, Planning and Economic Development (July 2013-May 2016) and Member of the Committee on Environment and Natural Resources (July 2019 to May 2021).