Meet The Arabella Team

Sarah Sullivan Stremlau

Associate Managing Director, Head of Managed Organizations

Sarah Sullivan is an associate managing director and the head of Arabella’s Managed Organizations team, which oversees several nonprofits, including the New Venture Fund, a 501(c)(3) public charity, and the Sixteen Thirty Fund, a separate 501(c)(4). Sarah helps donors and social entrepreneurs turn their philanthropic visions into reality by incubating nonprofits and implementing innovative donor collaboratives, advocacy campaigns, and grant-making initiatives.

Prior to joining Arabella, Sarah led the strategy practice at Orr Associates Inc. (OAI), a consulting firm serving the nonprofit sector. As vice president of strategy, Sarah developed sustainable organizational and revenue strategies for a broad spectrum of nonprofits. Earlier in her career, Sarah was senior research officer at the National Endowment for the Arts (NEA), where she oversaw the research portfolio and developed the strategic plan. Additionally, she worked in the Poverty Reduction and Economic Management Group at the World Bank, coordinating a 15-country study on economic mobility.

Sarah is vice chair of the board of directors for Advancing Girls’ Education in Africa, which provides scholarships and life-skills training to girls in Malawi. Sarah holds a BA and an MA in sociology from Stanford University and an MBA from the University of Pennsylvania’s Wharton School of Business.

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