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John Frederick "Jack" Lenz is a Canadian composer. He has written, performed, and produced music for film, television, and theatre, along with working on non-soundtrack album ventures. He is also the founder of Live Unity Enterprises, an organization devoted to the production of music for the Bahá'í community.
Lenz contributed additional music for the John Debney score for Mel Gibson's film The Passion of the Christ. Among his current projects is working on a movie about the persecution of Bahá'ís in Iran, particularly the story of Mona Mahmudnizhad who suffered under the persecution in Iran, under the title of Mona's Dream. He was music director of 90 Minutes Live, with Peter Gzowski on CBC Television from 1976 to 1978.
Lenz was born in Eston, Saskatchewan. His mother was also raised in Saskatchewan, and his father came to Canada from Hungary during the Depression. While still in his youth, Lenz took piano lessons from Garth Beckett and later studied composition at the University of Saskatchewan. Lenz became a professional musician when he played keyboards and flute for the soft-rock bands Seals and Crofts and Loggins and Messina touring around the world, performing before large audiences, and recording. Lenz' involvement in children's issues stems partly from having seven children of his own, as well as being in an arena which avoids "the conflict between what I believe about music and its sacred nature and dealing with what a lot of programming deals with, which sometimes could be the worst aspects of human nature." Lenz joined the Bahá'í Faith in 1969.
Lenz has done music production work for over 100 programs for various categories of mass media including television series and information/news programming, feature films, movies of the week, documentaries, live to broadcast, and children's television productions for networks like the CBC, NBC, Fox Broadcasting Company, PAX TV, Discovery Channel, Scholastic-HBO, Showtime, and Nelvana / CBS (as well as theatrical works).
- "Battle Dogs" for Discovery Channel US - producer and composer (2018–2019, ten episodes)
- "Good Witch" for Hallmark (2009 to 2019) (composer - all episodes and films)
- "Little Mosque on the Prairie" (2007, 95 episodes)
- "Sue Thomas: F.B. Eye" (12 episodes, 2003–2005)
- "The Passion of the Christ" (feature film, 2004)
- "Goosebumps" (TV series) theme and score for entire series (75 episodes)
- "Due South" (TV series) theme and score for entire series (65 episodes and two 2-hour movies)
- "RoboCop: The Series" score and songs for the entire series
- 13 years of the Hospital for Sick Children's telethon 
- 7 years of YTV's Youth Achievement Awards
- A tribute to renowned author Mordecai Richler – musical direction
- more than twenty separate television productions back to 1983
- Doc, a television series that aired from 2001 to 2004 starring Billy Ray Cyrus as Clint Cassidy, a small-town Montana doctor who moves to New York City.
- "Atomic Betty" theme and music score for all episodes
- "Nanalan" Seasons One and Two - producer and composer - all episodes for Nickelodeon and CBC and YTV
- "Mr. Meaty" Seasons One and Two - producer and composer - all episodes for Nickelodeon
- "Weird Years" producer and Composer - all episodes for YTV
- "Big Voice" producer and composer - all episodes for OWN and W Network
- "Mansions" producer and composer - all episodes for HGTV
- "Big and Small" Season One - producer and composer - (52 episodes) for BBC and Treehouse TV
- "What's Your News" - producer and composer - all episodes for Nick Jr. and CBC
- "Swami Jeff" - producer and composer - all episodes for Teletoon
- "Apollo's Pad" - producer and composer - all episodes for Teletoon
- "Ninjamaica" pilot for Teletoon - producer and composer
Nominated for several Gemini Awards:
- Best Original Music Score for a Series for:Due South, episode "Free Willie". (1995)
- Best Original Music Score for a Dramatic Series for: "Due South", episode "The Gift of the Wheelman". (1996)
- Best Pre-School Program or Series for: Nanalan' (2003) (Executive Producer and Music Director)
Winner of several SOCAN Awards:
- 14th Annual SOCAN Awards 2003
- Domestic Non-Animated Television Series Music Award
- International Television Series Music Award
- News & Sports Television Programming Music Award
- 16th Annual SOCAN Awards 2005
- Domestic Non-Animated Television Series Music Award
Albums or songs on albums
- Andrea by Andrea Bocelli (2004) (Go Where Love Goes)
- Musical Director of the Inauguration of the Bahá'í Terraces on Mount Carmel in Haifa, Israel, (2001)
- Music from the Second Bahá'í World Congress (1992, released 1994) (4 of 16 songs), ]]
- Jewel in the Lotus (1987)  (4 of 10 songs)
- We Are Baha'is (1982)
- Lenz also produced a 6 hr talk on Music and The Arts - The Oneness of Humankind, a spiritual journey explaining the origin of the various art forms and its important necessity in our lives.
- Lenz performed flute on 1977's Loggins and Messina Finale (album).
- Lenz, with Tony Kosinec, Alan Smith and Pat Arbour, wrote the Toronto Blue Jays "OK Blue Jays" song, which has become the Jays anthem, and is sung during the seventh-inning stretch at the Rogers Centre.
- "Official Website Bio". Archived from the original on 2015-10-17. Retrieved 2006-09-12.
- Cherry Lane Music Publishing, Film and TV Composers, Jack Lenz
- "Socan, Archived News 2004, Jack Lenz". Archived from the original on 2007-09-27. Retrieved 2006-09-12.
- Mona's Message
- Mona's Dream
- Note Mona Mahmudnizhad's story is also the subject of other art works: music artist Doug Cameron's popular song "Mona with the Children" which made the top of the pop charts (#14 for the week of October 19, 1985) according to "Pop Annual 1955-1999: Sixth Edition" "Pop Annual 1955-1999: Sixth Edition" for October, 1985 and as a play A Dress for Mona Archived 2007-02-02 at the Wayback Machine.
- Millennnium Arts Society Archived 2007-09-28 at the Wayback Machine – Jack Lenz in conversation with Joseph Lerner
- Bahá'í Community of Canada, Canadian Bahá'ís > In the News > Jack Lenz Archived 2004-11-07 at the Wayback Machine
- ole Expands Agreement with Jack Lenz and Lenz Entertainment
- IMBD Entry
- Jack Lenz Credits
- James Beveridge, Film Guru, Jack Lenz
- "14th SOCAN Awards". Archived from the original on 2007-09-27. Retrieved 2007-01-13.
- "16th Annual SOCAN Awards". Archived from the original on 2006-12-31. Retrieved 2007-01-13.
- Music for the Second Bahá'í World Congress
- Also appeared in the episode All the Queen's Horses in the Canadian series "Due South," in April, 1996
- Jewel in the Lotus
- Divine Notes - We Are Baha'is, Album Details Archived 2007-08-22 at the Wayback Machine
- "Music and The Arts - The Oneness of Humankind". Archived from the original on 2007-09-28. Retrieved 2007-01-13.
- "RPM 50 Singles". RPM (through Library and Archives Canada). September 17, 1983. Archived from the original on October 8, 2012. Retrieved June 2, 2009.
- Lenz Entertainment Artist Management[permanent dead link]
- Ava: Turning Point[permanent dead link]