On stage Gregory has performed as a concert soloist with The Queensland Pops Orchestra, Australia’s leading Symphony Orchestras, The Wellington Sinfonia, The Perth Pops Orchestra, The State Orchestra of Victoria, and The Australian Army Band, Brisbane. He was the voice and face for World Water Day 2006 in Brisbane and has twice performed the National Anthem at the Official Australia Day Flag Raising Ceremony. Due to Gregory’s contribution to the arts, he was invited to be an Australia Day Ambassador for the Queensland Government in January 2009, 2010 & 2011.

In 2001, Gregory spent 18 months touring Australia as understudy to Simon Gallaher in the ESGEE production of The Pirates of Penzance playing the lead role of Frederic on a number of occasions and was an original member of the popular male ensemble The Ten Tenors. Gregory has toured extensively throughout Australia, New Zealand and Canada as the Tenor Soloist in the acclaimed production of Scotland the Brave the international smash hit celebration of the best of Scottish music, song and dance. In April 2009, he made his American debut performing in Scotland the Brave at the prestigious Avery Fisher Hall, Lincoln Centre in New York City.

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