John Leventhal
John Leventhal (born December 18, 1952) is a Grammy Award-winning musician, producer, songwriter, and recording engineer who has produced albums for Michelle Branch, Rosanne Cash, Marc Cohn, Shawn Colvin, Rodney Crowell, Jim Lauderdale, Joan Osborne, Loudon Wainwright III, The Wreckers and many others.
source: Wikipedia