The American investment company completed a takeover of the Rossoneri on Saturday, with new a board elected at a shareholders' meeting in Milan.
"I am humbled by the opportunity to lead AC Milan's board of directors, and grateful for the trust and support of my fellow board members," Scaroni, a former CEO of Italian energy company Eni and glass manufacturer Pilkington in London, is quoted by Goal.com as saying.
"This is a critical moment in the club's storied history, and we're all grateful to have a new owner committed to returning AC Milan to its former glory. At the board level, we will do everything possible to put the coach and the players in a position to succeed. There is considerable hard work ahead, and we are eager to build upon today's momentum."
Milan had been suspended from the Europa League for this season after failing to comply with UEFA Financial Fair Play rules but were reinstated after the Court of Arbitration for Sport (CAS) overturned the decision.