Andrew is a Public Financial Expert and the erstwhile Technical Adviser on Tax Policy to the Nigerian Coordinating Minister for the Economy and Minister of Finance. Prior to this, he had served as Deputy Director (Procurement) at the Federal Ministry of Finance, Deputy Director (Non-oil Revenue) at the Budget Office of the Federation and Assistant Director (Internal Audit) at the Tertiary Education Trust Fund. He has consulted for several international organizations including the World Bank, Atos Consulting, Oxford Policy Management, Cardno Emerging Markets, ECOWAS and Price Waterhouse Coopers among others.