Named "Entertainment Lawyer of the Year" by Billboard Magazine, John Mason has represented a variety of icons in the entertainment industry throughout his career, including notable names in film, television and music and top talent in literary and music publishing, sports and electronic media. Mason is a Tennessee Supreme Court Rule 31 Listed Mediator. Mason has served as the chairman of the Nevada Film Commission and has hosted both his own nationally televised satellite talk show and a regular segment on the CW affiliate in Reno, Nevada.

Mason has served as national trustee and chairman of the Western Regional Executive Board of the National Foundation for Ileitis and Colitis Sports Council, on the Board of the Unusual Suspects Theater Company and he is a Knight Commander of the Equestrian Order of the Holy Sepulcher of Jerusalem, a Lifetime Papal Order.

He also served for eight years as a member of the President's Committee on The Arts and Humanities. Mason and his legal work have been highlighted by a variety of prominent publications, including The Los Angeles Times, The American Lawyer, Los Angeles Magazine, The Wall Street Journal, The Hollywood Reporter, Los Angeles Daily Business Journal, Variety, The New York Times, Reno Gazette Journal and Las Vegas Review.