Dr. Zachary P. Stewart is the Production Systems Specialist and a US Diplomat with USAID within the Bureau for Resilience and Food Security and has nearly 15 years of experience in international agricultural research and development. He earned his bachelor’s degrees in Biology, Environmental Sciences, and International Relations from Creighton University, master’s degree in Control of Infectious Diseases from the London School of Hygiene and Tropical Medicine, and PhD in Soil Science and Crop Physiology from the University of Nebraska-Lincoln. Prior to his work at USAID, Dr. Stewart was a Research Assistant Professor at Kansas State University where he served as a Principal Investigator on research activities across sub-Saharan Africa and Southeast Asia. He also served as the Program Manager for the SOILS Consortium with the Feed the Future Innovation Lab for Collaborative Research on Sustainable Intensification and International Fertilizer Development Center. His research is primarily related to the sustainable intensification of smallholder farming systems and improving the health and fertility of soils as the foundation for nutritious food production and resilient and sustainable livelihoods. His work is strongly collaborative with a diversity of partners across disciplines and institutions.