Olatunji holds degrees in both Social Science and Law, from the University of Ibadan. He started his career at Ajumogobia, Okeke, Oyebode & Aluko honing his skills in commercial law and litigation. He also had served in the Banking and Asset Management sector, culminating in the role of pioneer Vice President, Legal & Compliance of Asset & Resource Management Company Ltd, (ARM).

He joined Shell Petroleum’s Nigerian operations in 1996 as Legal Adviser, Contracting & Projects, and was pioneer Legal Adviser & Company Secretary of Shell Exploration & Production Africa Limited, following the creation of its African regional office in 2004.

In 2009 he rose to become Country Head of Legal & Group Company Secretary for all the Shell Companies in Nigeria. In 2012, he joined Addax Petroleum Nigeria, as Deputy Managing Director, overseeing its External, Government & Regulatory Affairs, Human Resources & Admin, Legal, Community Relations, Security & Supply Chain Management Business Groups. He voluntarily retired from Addax in January 2022.