As a soloist, Greg has released and been featured on a number of CDs which emanate from the Trombonis Australis Project, initiated in 1990 to develop and present an Australian contribution to international brass repertoire. He has performed in Australia, Europe and Asia as a recitalist and with ensembles such as the Orchestre de Picardie, Shanghai Symphony Orchestra, Royal Australian Air Force Air Command Band, Orchestre de Cuivres d'Amiens, Orchestre à Vent de Doullens, Le Brass Band Nord Pas de Calais, Gouds Symfonie Orkest, University of Newcastle Wind Orchestra and the Sydney Youth Orchestra. Greg has also addressed international conferences of the Internationale Gesellschaft zur Erforschung und Förderung der Blasmusik and World Association of Symphonic Band Ensembles with respect to the development of Australian trombone repertoire and has also been the author of numerous articles for journals in Australia and overseas. He has been described by international trombonist and composer John Kenny “as one of the most interesting trombonists pushing for increased recognition of the trombone anywhere.”
Greg was a part time member of the brass faculty at the Sydney Conservatorium from 1993-2004. He has given masterclasses in Australia and overseas including a period in 1998 as guest lecturer in trombone at the Shanghai Conservatory and later that year, Acting Head of Brass at the Sydney Conservatorium. Greg has also been enterprising as a chamber musician being a founding member of the Early Brass Consort of Sydney and has been active in promoting Opera Australia Brass which made a highly successful concert tour of China in May 2000. Future projects include recordings of repertoire for trombone and organ, recitals for national and local radio as well premieres of a number of his compositions.