Mr. Ouko is the Executive Director of Edrak Associates, a firm registered in Kenya specialising in Public and Private Sector Governance, Financial Management, Accountability and Audit Organisation Capacity Assessment and Development, Monitoring, Evaluation and Learning. The firm also focuses on Third Party Monitoring (TPM) services to commissioning organisations, donors and partners to ensure greater accountability and overall compliance. Before joining Edrak Associates, he was the Auditor-General of the Republic of Kenya from August 2011 to August 2019, diligently executing his duties with utmost independence and integrity. He served in various capacities at the African Development Bank for over 24 years from March 1987 to August 2011, where he managed, directed and supervised audits, anti-corruption and fraud investigation functions for over 12 years cumulatively. Mr Ouko is a Fellow Member of the Institute of Chartered Accountants of England and Wales (ICAEW) and the Institute of Certified Public Accountants of Kenya (FCPA).