[6] He started his career from Arthur Anderson &Co in 1985 and from 2000 to 2003, Lemo served as managing director of Wema Bank Plc, and in 2003, became the deputy governor of operations and director of the Central Bank of Nigeria—serving as its deputy governor of financial surveillance sector.
[1][2][3] On 2 January 2004 Lemo became the director and chairman of the Abuja Securities & Commodity Exchange Plc.
[1] On Friday 6 October 2017 President Muhammadu Buhari of Nigeria approved his appointment as the new chairman of the Federal Emergency Road Maintenance Agency (FERMA).
[8] On Monday 2 October 2021, Tunde blamed infrastructural decay as the reason why investors run away from Nigeria.
On Thursday 23 December 2021 Union Bank of Nigeria Plc, in a disclosure filed with the Nigerian Exchange Limited (NGX), announced that Tunde Lemo owned Titan Trust Bank Limited has reached an agreement with Union Global Partners Limited and other shareholders to acquire a combined 89.39 percent stake in Union Bank of Nigeria Plc.