The Bianconeri skipper has spent the last 12 years in Turin, winning four Serie A titles with the club and becoming captain in 2012.
Marotta believes the 35-year-old is an excellent professional and would like to see the former Parma man continue to represent the club for years to come.
"Buffon is a true champion," he told La Gazzetta dello Sport.
"He is a superlative professional.
"My hope and wish is that he can defend Italy and Juve's goal for many years to come.
"I believe and I hope that he will finish his career with Juve and this is the basis for him to remain at Juve for a long time."