Nzomo worked as an Economist at the Central Bank of Kenya for six years from the year 1994 before moving to
RBA in 2000 as Chief Manager, Research and Development. After 13 years, he was seconded to the National Treasury & Planning as a senior adviser, the Financial sector in Jun 2013, and was acting Director in the Financial and Sectoral Affairs Department until Mar of the year 2017. He returned to
RBA in Apr 2017 as acting chief executive officer for 14 months before taking over fully until his retirement in Jun 2022. In September 2019 he was called upon to serve as the Interim chair of the African Pension Supervisors Forum. ==Education==