Sale finished third in the Premiership, losing at Leicester Tigers in their play-off semi-final on Saturday.
It was the fourth time in the past five seasons the Sharks have finished in the top four, but they have not been champions since 2006.
Now Bortolami will bring his experience to the coaching team, having worked at Benetton since he retired from playing in 2016, firstly as an assistant before taking the top job.
For Sanderson, having someone of Bortolami’s stature can help the club’s push to take that next step.
“This is a huge coup for the club because Marco is an international-level coach,” he said.
“But that’s the level that our coaching needs to be at because that’s the kind of team we’ve got here.”
