Head coach Gregor Townsend is excited about the addition to Glasgow's playing pool for next season.
He said: "Simone is an excellent signing for the club and he'll add more depth and competition for places in the back-row.
"He is a very committed player who tackles low and competes hard for ball in contact.
"Simone has played regularly in the GUINNESS PRO12 and in Europe and has more than 20 caps for his country, so he'll bring a lot of experience when he joins us in the summer.
"I believe he will develop further within our environment and with the ability of playing at either 6 or 7, he's going to increase our options in the back-row."
Speaking to the Italian press, Simone said: “I’m very excited about this opportunity to play overseas.
“I’ve played in Italy all of my career, so this is a new challenge for me.
“Glasgow Warriors are one of the top sides in the Guinness PRO12 and have performed well in Europe this season.
“I believe I can become an even better player working with the coaches in Glasgow and I’m looking forward to continuing my development in Scotland when I move there in the summer.
“At the moment my focus is on playing for my country in the RBS 6 Nations and then helping Benetton Treviso finish as high up the league as possible.”