Mark O’Leary OAM is well known in Australia, widely respected for his work with Young Voices of Melbourne, Exaudi and Gondwana Voices. He has made 37 tours with YVM and Exaudi to all states and territories of Australia as well as Europe, the United Kingdom, Ireland, South Africa, Canada, the USA, Singapore, Malaysia, Thailand, Samoa, New Zealand and Japan, and recorded 13 CDs with these choirs. With Gondwana Voices he has made 5 international tours to Europe, North America, China and Taiwan and conducted the choir on 3 recordings.

Mark is a regular guest conductor and presenter at choral festivals and music education conferences around the country. He publishes Australian choral music in the Young Voices of Melbourne Choral Series and is the creator of the Sight Singing School books and website used in more than 45 countries. He has three degrees from the University of Melbourne, is a Churchill Fellow, and an Honorary Life Member of the Kodály Music Education Institute of Australia. In 2018 he was awarded the Medal of the Order of Australia for services to education and choral music.