After returning to Uruguay from the Andes, Zerbino continued studying medicine but ultimately did not graduate. Instead, he earned a business administration degree from the
University of the Republic. He also continued playing rugby union, he was a member of the
national team, and participated in the
1973 and
1977 South American Rugby championships, in which Uruguay finished as runner-up. Since 1980, he has been director of Cibeles S.A., his family's pharmaceutical company founded in 1975. He also has served as president of the Chamber of Pharmaceutical and Related Specialties of Uruguay (CEFA). He is co-founder and vice president of , a foundation created in 2009 with the aim of promoting the values of this sport through awareness campaigns, events, conferences and sporting events. In addition, as a sports executive and administrator, in December 2007 he was elected president of the
Uruguayan Rugby Union, and in 2009 was re-elected for a second two-year term. In 2011 he was succeeded by Marcello Calandra. == Personal life ==