Jorge Sztein is a veterinarian of the Universidad Nacional de La Plata (Argentina) and Doctor in Sciences of the same university specializing in laboratory animals (1991). Then after working at the National Academy of medicine(1987-1989, Buenos Aires), start in 1990 as a post doctoral student at the NIH (National Institutes of Health of the United States) creating transgenic animals and performing cryopreservation techniques. In 1995 the Jackson Labs hires me as head of research in Cryobiology and also has duties as professor in the cryo-courses of the institute in USA, Italy, France and Spain. In the year 2000 I returned to the NEI-NIH as Colonies Manager and head of cryopreservation and then in the 2008 move to another Institute (NIAID) as director of cryopreservation and assisted reproduction till July2013. Today I'm an independent consultant on cryopreservation and Assisted reproduction.