Jorge A. León studied the PhD in equivalence of solutions to stochastic evolution equations at the Department of Mathematics of Cinvestav-IPN, Mexico. He has carried out joint research work with internationally recognized researchers. He has mainly contributed to the development of stochastic calculus and integration, and their applications to stochastic differential equations with different interpretations of stochastic integral. He has co-organized several conferences on stochastic analysis among which we can mention the Latin American Congress of Probability and Mathematical Statistics (CLAPEM), the joint meeting between USA and Mexico, Bernoulli-IMSWorld Congress, Symposium on Probability and Mathematics Statistics, which was the most important meeting in probability at Mexico, etc. He has taught at Cinvestav-IPN for 35 years.