And with Kahn Fotuali'i joining English Premiership side Northampton Saints at the end of the season, Tebaldi has taken the chance to move to join the Ospreys from Pro12 rivals Zebre.
"I'm excited about this fantastic opportunity with the Ospreys. Their record in the Pro12 speaks for itself and the chance to be a part of such a successful club is something I couldn't turn down," said Tebaldi.
"I'm looking forward to a new challenge in a competitive environment that will help me to improve as a player and a person while hopefully contributing to the continued success of the Ospreys."
Tebaldi has 16 international caps to his name, scoring three points, since making his debut against Australia in Canberra during the Azzurri's 2009 tour Down Under, last featuring in the RBS 6 Nations in 2010.