Banking and financial services
Cardoso had a brief spell with Howard Tilly & Co., Chartered Accountants in London before taking up a role with Citibank.[12] Cardoso went through the Citibank credit training program in Athens, Greece, and was subsequently mobilised to Citibank in Abidjan, Ivory Coast in 1982. He operated within the West Africa Regional Office/Non-Presence Country desk, which encompassed multiple countries in the sub-region where Citibank had exposure to sovereign debt but no physical presence. In 1982, Cardoso returned to Nigeria and joined Chase Merchant Bank, an affiliate of Chase Manhattan. Within the bank, he worked as a member of the credit and marketing team, focusing on trading, construction, and oil and gas relationships.
In 1984, he rejoined Citibank as a founding member of Nigeria International Bank Limited assuming the role of Head of the World Corporation Group, responsible for managing crucial global relationships for Citibank. He also became a member of the bank’s credit committee with responsibility for assessing and approving credit limits.
In 1988, Cardoso was charged with setting up Citibank’s first branch outside Lagos, in Kano, Nigeria. From Kano, he led the bank’s operations across the north of Nigeria. Subsequently, Cardoso was appointed Vice President.
In 1990, Olayemi, along with fellow Citibank colleagues, founded Citizens Bank, Nigeria where he assumed leadership roles as the Head of Corporate Banking and Head of Treasury and Financial Institutions consecutively. In addition, he served as an Executive Director of the bank for eight years.
Lagos State government
In 1999, with the transition to democratic rule in Nigeria,[13] Cardoso was appointed a Commissioner in Lagos State. He set up and oversaw the Ministry of Economic Planning & Budget,[14] which functioned as the think-tank of the administration.
During his tenure within the Lagos State Government, Cardoso chaired various cabinet-level committees, including but not limited to:
- Cabinet Project Monitoring Committee
- Lagos Urban Transport Project Office (which later evolved into Lagos Metropolitan Area Transport Authority)
- Privatization Committee
- Lagos Water Corporation
- State Security Trust Fund Committee (which he pioneered), and
- State Pension Fund Committee
Development work
Cardoso founded the Africa Institute for Leadership and Public Administration (AILPA), which focused on promoting private-public partnerships.[17][better source needed]
He is a member of the Nigerian National Advisory Board on impact investing[18] and serves on the advisory board of Lagos Business School.[19]
Cardoso is also a member of the Board of Trustees for DRASA Health Trust, a public organization established in honour of the late Dr. Ameyo Adadevoh.[20]