Allan joined the Barbershop Harmony Society in the fall of 1987. Originally with the Palomar-Pacific Chapter, he was also a founding member of the La Jolla Chapter (Pacific Coast Harmony) and is an emeritus member of the Santa Fe Springs Chapter (Masters of Harmony).
- Lead Section Leader: Palomar-Pacific Chapter, La Jolla Chapter
- Assistant or Associate Director: Palomar-Pacific Chapter, La Jolla Chapter
- Certified Director: Barbershop Harmony Society
- International Chorus Champion with the Masters of Harmony in 2002
- Executive Producer: American Harmony
- 2014 Far Western District President