CIMMYT training courses play a critical role in helping international researchers meet national food security and resource conservation goals. By sharing knowledge to build communities of agricultural knowledge in less developed countries, CIMMYT empowers researchers to aid farmers. In turn, these farmers help ensure sustainable food security. In contrast to formal academic training in plant breeding and agronomy, CIMMYT training activities are hands-on and highly specialized. Trainees from Asia, Africa, and Latin America benefit from the data assembled and handled in a global research program. Alumni of CIMMYT courses often become a significant force for agricultural change in their countries.