Johnson is a Finance and Risk Management specialist with over 15 years of work experience, 8 of which were at senior executive level managing financial institutions within Kenya, Uganda, Tanzania, Rwanda and  Ghana. His areas of expertise include:
strategic business planning, risk management, compliance,financial planning and analysis, responsible  finance, business process re-engineering, corporate governance and training.

He is currently the 1st Vice Chair of the Institute of Internal Auditors Kenya. He has worked for Commercial Bank of Africa, Chase Bank, Barclays Bank, KPMG and PwC. Johnson is passionate about corporate governance and serving the public.

He is a Board member and Chair of Risk and Audit Committee at Century Microfinance Bank, Board Member and member of Governance, Risk and Audit Committee at Mater Hospital and sits in other various Boards.
Johnson is a member of IIA, ACCA and ISACA.