After a 18-year career as a player, Bernazzani moved on to coaching, initially with the Piacenza youth team in 1998. That lasted until 2000, when he replaced first-team Piacenza coach Luigi Simoni who had been sacked. Following the conclusion of the 1999–2000 Serie A season, Bernazzani returned to the Piacenza youth teams for three more years (first for Allievi and second and the third season for Primavera). In 2003 he moved on to the Inter "Primavera" U20 youth team, serving as head coach until 2006 and again since 26 March 2012 (as Andrea Stramaccioni promoted to first team), winning 2006 league title. Bernazzani was the coach of "Allievi Nazionali" U17 youth team of Inter from 2006 to 2008, with one league title in 2008.
Bernazzani was the technical assistant of the first team from 2008 to 2012, serving Mourinho, Benítez, Leonardo, Gasperini and Ranieri.