As Mr. Biden settles into the office he has chased for more than three decades, aides say he demands hours of debate from scores of policy experts.
Mr. Ricchetti, who was named Joseph R. Biden Jr.’s counselor, has been a key player in Mr. Biden’s life since joining his vice-presidential staff in 2012.
Lobbyists and consultants are highlighting their ties to the incoming president, which have become lucrative.
The appointments of Jennifer O’Malley Dillon, Representative Cedric Richmond and Steve Ricchetti suggest the importance that the president-elect is placing on surrounding himself with people he trusts.
Many of his aides and close allies are veteran Washington hands who have profited from advising big corporations. The Sanders-Warren wing of the party is not happy.