Mimi Alemayehou is the Founder and Managing Partner of Semai Ventures LLC, which collaborates with mission-driven enterprises to advance sustainable development in emerging economies. She is also a Senior Advisor of the Three Cairns Group, an investment and philanthropic firm working to accelerate the transition to a low-carbon economy. Previously, she was Senior Vice President for Public-Private Partnerships at Mastercard where her portfolio included initiatives designed to catalyze social impact and financial inclusion in emerging markets. As Managing Director of the Black Rhino Group and Chair of Blackstone Africa Infrastructure, she advanced major energy and infrastructure projects across Africa. Her government service includes an appointment as Executive Vice President of the Overseas Private Investment Corporation (OPIC) and as the U.S. representative on the Board of the African Development Bank. She is on the board of the ONE Campaign whose mission is to end extreme poverty. Previously she served on the board of Climate Change Crisis Real Impact and the board of Energy for Growth Hub. Her other board roles have included Fin Dev Canada, the US African Development Foundation, and Twitter, Inc.