 In 1990, she established Iron Gate Finance and Trust Company Limited, a privately owned finance and investment company where she served as Managing Director.In 1996, Olusola was employed as the Executive Director, Finance and Administration of Materials Management Services Limited and later rose to become the company's Managing Director.In 2003, Olusola was elected as Deputy Governor of Osun State with Olagunsoye Oyinlola as governor until on November 27, 2010 when she vacated the post.