Voice acting
Boen had a voice role as Taurus in the direct to video G.I. Joe: The Movie (1987). He voiced Police Chief Kanifky in Bonkers, Horace Bleakman in the Clifford the Big Red Dog television series, and Señor Senior Sr. in Kim Possible. He also voiced the villainous pirate LeChuck from the Monkey Island series of adventure games. He also provided the introductions for World of Warcraft and its expansions, voiced Magtheridon in World of Warcraft: The Burning Crusade and King Terenas Menethil II in World of Warcraft: Wrath of the Lich King, including the cinematic trailer and ending cutscene for that expansion, which featured the iconic line "no king rules forever, my son."
He also voiced the omnipotent alien Nagilum in a second season episode of Star Trek: The Next Generation.
Boen voiced the dramatic thespian Edwin Blackgaard in Focus on the Family's "Adventures in Odyssey", as well as Edwin's nefarious twin brother Regis. He portrayed Sergei Gurlukovich in Metal Gear Solid 2: Sons of Liberty, a role that he later reprised in the Metal Gear Solid 2: Substance rerelease and the official digital graphic novel. Other roles include Colossus in X-Men: Legends and a variety of characters across multiple Star Trek titles, including Bridge Commander and Armada II.
Boen's voice was heard on the Disneyland Railroad from 2002 until 2016 and on the Walt Disney World Railroad from 2002 until late 2010.
He continued in voice-over work until his full retirement from acting in 2017.