Adebayo Ogunlesi, the Sagamu-born lawyer and investment banker, built Global Infrastructure Partners from a new firm in 2006 into an infrastructure investment business managing more than $100 billion before its acquisition by BlackRock, placing a Yoruba-born executive at the centre of some of the world’s largest transport, energy and digital infrastructure investments.
Ogunlesi remains chairman and chief executive of Global Infrastructure Partners, known as GIP. He is also a senior managing director of BlackRock, a member of its Global Executive Committee and a director of the company. BlackRock completed its acquisition of GIP on 1 October 2024 after announcing a transaction valued at about $12.5 billion in cash and shares earlier that year.
The combination brought GIP’s specialist infrastructure platform into the world’s largest asset manager. At the time the deal was announced, GIP managed more than $100 billion and invested across energy, transport, water and waste, and digital infrastructure. Those are sectors in which projects commonly require large pools of patient capital and years of operational oversight.
Ogunlesi’s path to that position began in Makun, Sagamu, in Ogun State. He attended King’s College, Lagos, before studying philosophy, politics and economics at Oxford University, where he earned first-class honours. He later completed a law degree, graduating magna cum laude from Harvard Law School, and an MBA from Harvard Business School.
His early career joined law, public institutions and international finance. He served as a law clerk to Thurgood Marshall, then an associate justice of the United States Supreme Court, and worked as a lawyer at Cravath, Swaine & Moore in New York. The experience gave him an unusual combination of legal training and commercial exposure before he moved fully into investment banking.
Ogunlesi joined First Boston, later part of Credit Suisse, in 1983. He spent 23 years at the bank and rose through senior positions including head of global investment banking, executive vice-chairman and chief client officer of the investment banking division. His work included major transactions in energy and infrastructure, fields that would later become the foundation of his own investment firm.
In 2006, Ogunlesi and fellow partners established GIP with backing from Credit Suisse and General Electric. The firm concentrated on infrastructure rather than trying to compete across every branch of private investment. It acquired and managed major assets in aviation, energy, transport and other essential services, with investments including airports and large-scale energy businesses.
That focus made GIP one of the best-known independent infrastructure investors in the market. Its growth also reflected the increasing demand for private capital in assets that governments and public balance sheets cannot always finance alone. Airports, power systems, data centres and transport networks can require billions of dollars before they generate stable long-term returns.
The BlackRock transaction gave GIP access to a much larger global platform while retaining its specialist leadership. BlackRock said at completion that the acquisition created a leading infrastructure private-markets franchise. Ogunlesi subsequently joined BlackRock’s board and executive leadership, while continuing to lead GIP.
His current responsibilities extend beyond the combined investment group. GIP’s official biography lists him as a director of OpenAI, Topgolf Callaway Brands, Kosmos Energy Holdings and Terminal Investment Limited. He previously served as lead director of Goldman Sachs.
Ogunlesi’s appointment to OpenAI’s board in 2025 placed him at another point where finance, infrastructure and technology intersect. The rapid expansion of artificial intelligence has increased demand for data centres and reliable power, creating a new infrastructure challenge for investors and governments. GIP, BlackRock, Microsoft and MGX had already announced a partnership in 2024 aimed at mobilising capital for AI data centres and the energy systems needed to support them.
For Nigeria and the wider African diaspora, Ogunlesi’s career is notable not only for the size of the transaction that brought GIP into BlackRock, but also for the route by which specialist expertise became an international business. He moved from legal practice to investment banking, then used decades of transaction experience to build a firm around a clearly defined sector.
The executive has also taught courses on transnational investment projects at Harvard and Yale. That academic work sits alongside a career dealing with the practical questions behind major projects: how they are financed, how risk is shared and how long-term assets are operated.
Today, Ogunlesi works from New York but retains a public identity rooted in Sagamu and Nigeria. His leadership of GIP continues within BlackRock as investment in power, transport and digital systems becomes increasingly important to economic growth. The business he helped establish two decades ago is now part of a global investment group, while its founder remains responsible for guiding the infrastructure platform he built.
