Brendan has been involved with a number of bands in New Zealand, in many administrative and playing roles ranging from conductor to librarian, from second horn to soprano cornet to timpani. In 2024, Brendan was elected to the National Management Committee of the Brass Band Association of New Zealand.

After 8 years as a professional orchestra librarian, Brendan is now Director of Music for the Wellington Chapel, where he conducts a band and choir, teaches, arranges, and is responsible for all musical activity on the chapel precinct.