Upon graduating from the UCLA School of Law, he served as a California Deputy Attorney General, 1973-1984. As head of the Attorney General's Los Angeles Office of Special Prosecutions, he prosecuted organized crime and prison gang cases throughout California. He was the head prosecutor in the famous "Hillside Strangler" trial and convicted Angelo Buono of the murder of 9 young women in Los Angeles.
Governor George Deukmejian appointed him a judge of the Newhall Municipal Court in 1984 and elevated him in 1985 to the Superior Court of Los Angeles County. As a Superior Court judge, Justice Boren presided over the "Twilight Zone" trial involving the deaths of an actor and 2 children caused by a helicopter crash during the filming of a movie. He also presided over several death penalty cases.
Justice Boren was appointed to the Court of Appeal by Governor Deukmejian in 1987, and Governor Pete Wilson appointed him Presiding Justice of Division Two of the Second Appellate District in 1993. Since 2004, Justice Boren is also the Administrative Presiding Justice of the Second Appellate District, responsible for managing the personnel, facilities, and budget of the Court.
He has been an instructor in judicial education and was the chair of the Appellate Courts Committee of the California Judges Association (1998-2003). He was advisor to the National Center for State Courts regarding a publication to assist trial judges, entitled "Managing Notorious Cases." He has served on various judicial committees and organizations, including the California Judicial Council, the policy body of the California state courts and the Chief Judges Council of State Courts of Appeal.
Justice Boren served for 20 years on the board of directors of Henry Mayo Newhall Memorial Hospital, part of the Los Angeles County trauma network. He was twice elected chairman of the board.
Justice Boren and his wife Windee have 6 children and 10 grandchildren. His principal recreational activities are fishing and swimming.