Calgary Philharmonic Orchestra musicians are members of The Calgary Musicians Association, Local 547 of the American Federation of Musicians of the United States and Canada. Repertoire often requires extra musicians including: Lidia Haeju Lee, Violin; Christine Chen, Violin; Dean O'Brien, Viola; Ronelle Schaufele, Viola; Patricia Higgins, Viola; Janet Kuschak, Cello; Sheila Garrett, Bass; Daniel Nava, Bass; Sarah MacDonald, Flute; Emily Phernambucq, Flute; Katrina Kwantes-Oliveira, Oboe; Lief Mosbaugh, Oboe; Aura Pon, Oboe; Stan Climie, Clarinet; Ilana Dahl, Clarinet; Natalia Peric, Clarinet; John Feldberg, Bassoon; Heather Wootton, Horn; Laurie Matiation, Horn; Richard Scholz, Trumpet; Gareth Jones, Trumpet; Nikki McCaslin, Trombone; Mark Harding, Trombone; Greg Burns, Trombone; Tyler Cairns, Bass Trombone; Sean Buckley, Percussion; Graeme Tofflemiere, Percussion; Rolf Bertsch, Piano; Darren Young, Guitar; Kodi Hutchinson, E. Bass; Tyler Hornby, Drums; Richard Harding, Saxophone; Gerry Hebert, Saxophone; Jeremy Brown, Saxophone.