Roberto graduated in 1995 and then went on to study for a post graduate degree in veterinary microbiology at the Royal Veterinary College (University of London). In 1996 he moved to the government's Veterinary Laboratories Agency (VLA) to undertake a PhD on the pathogenesis of E. coli in poultry. On completion of his PhD studies, Roberto commenced a post-doctoral position at Royal Holloway, University of London, studying E. coli virulence factors and vaccine development.
In 2005, Roberto was appointed Head of Pathogenesis and Control at the AHVLA and in 2010 he was appointed Professor of Veterinary Microbiology and Pathology at the University of Surrey. He gained the FRCPath in 2010 and in 2012 was appointed the Associate Dean for Veterinary Strategy in the new School of Veterinary Medicine at the University of Surrey.
In 2014 he was appointed to the position of Head of the Department of Pathology and Infectious Diseases and Director of the Veterinary Pathology Centre. In 2019 he was appointed Deputy Head of the School of Veterinary Medicine at the University of Surrey. He is the past president of the Med-Vet-Net Association and the Veterinary Research Club, a member of the Houghton Trust, a member of the APHA science advisory board and the chair of the Royal College of Pathologists Veterinary Pathology SAC.