Ogunlesi was the former head of global investment banking at Credit Suisse First Boston[3] before being promoted to chief client officer and executive vice chairman.

[6] From 1980 to 1981, Ogunlesi served as a law clerk to associate justice Thurgood Marshall of the United States Supreme Court.

[9] In July 2006, Ogunlesi started the private equity firm Global Infrastructure Partners (GIP), a joint venture whose initial investors included Credit Suisse and General Electric.

BlackRock will pay $3 billion in cash and 12 million of its own shares as part of the deal to buy GIP.

The 400 people directly employed by GIP will receive some of the stock, and five of the six founding partners, including chief executive Ogunlesi, will join BlackRock as part of the deal.

[8][18] In December 2016, it was announced that Ogunlesi, among other business leaders, would be part of Donald Trump's Strategic and Policy Forum,[19][10] which was disbanded on 16 August 2017.

[23] As of 2025, Forbes estimates his net worth at US$ 2.4 Billion Recipient of The International Center in New York's Award of Excellence.