Based in Nairobi, Karen is a serial social entrepreneur with over twenty-five years of experience working in Africa and South Asia. She has played a key role in building the global ecosystem for evidence and scale in international development and has an extensive track record of bringing evidence-based programs and organizations from early concept stages to a national-level scale. Before co-founding Fit for Purpose, Karen held senior leadership and founding roles at Evidence Action, Innovations for Poverty Action, Deworm the World, and the Tawasal Institute. A strategic thinker and creative problem-solver, she has extensive technical expertise in using evidence to design, implement, and monitor development interventions. Karen has a deep understanding of what it takes to build partnerships and coalitions. She earned her MSc in Social Policy from the London School of Economics and her PhD in Development Planning from the University of London. Karen participated in Y Combinator in 2017 and is a recipient of the Echoing Green Fellowship for her leadership as a social entrepreneur. She is a fluent Swahili speaker.