Hosanna has worked in the non-profit sector for 24 years, including five years in humanitarian complex emergency environments and three years as a consultant for NGOs working in the humanitarian sector. She is the owner of Hively, a full service consulting group for non-profit organisations. She also serves as an adjunct Professor at Columbia University’s School for International and Public Affairs in the Human Rights and Humanitarian Policy concentration. She previously worked for Doctors Without Borders/Médecins Sans Frontières (MSF) in DRC, Nigeria and South Sudan in a humanitarian affairs capacity. She has since worked in Nigeria, South Sudan, Central African Republic and Iraq delivering trainings and conducting research on humanitarian topics. Her work focuses on organizational support and individual coaching, retreat design and facilitation, research and analysis, advocacy and communications support, and humanitarian access and negotiations support. Hosanna holds a BA in International Affairs from American University of Paris, an MA in Human Rights Law from the School of Oriental and African Sciences and a Diploma in French Language and Culture from the Sorbonne. She is fluent in French.