Sarah Lebu is a PhD candidate in Environmental Sciences and Engineering and has over 13 years of experience in public health, environmental engineering, urban planning, and climate science. Her work focuses on how extreme weather impacts water and sanitation services, particularly in vulnerable communities. In her doctoral research, she assesses the performance of sanitation systems and fecal contamination in flood-prone areas using fluorescence spectroscopy and bayesian belief networks, in order to guide climate-resilient investment decisions. She has worked extensively on research efforts relating to sanitation in urban, peri-urban, and humanitarian settings across Kenya, Uganda, Tanzania, Rwanda, DRC, Zambia, Côte d'Ivoire, and The Philippines. She holds dual master’s degrees in Public Health and City Planning from UC Berkeley.