Mary-Jean is an international coloratura soprano who has US, Greek/EU and Australian Citizenship. In November 2011 she made her debut at the Royal Albert Hall, London, singing the Queen of the Night's aria in Raymond Gubbay's Classical Spectacular. In March 2011 she performed the title role of Lucia in Prague State Opera's production of Lucia di Lammermoor, and reprised the role there in September 2011. In the Autumn of 2010 she performed the role of "Najade" and covered the role of "Zerbinetta" for Welsh National Opera's production of Ariadne auf Naxos.
In February (2010) she performed the role of "The Queen of the Night" in Opera Ddraig’s production of The Magic Flute in Cardiff, UK; and in the summer of 2009 she performed the role of "Carolina" in CIAV's production of Il Matrimonio Segreto in Barga, Italy. In 2008, Mary-Jean sang the role of "Galatea" in Pacific Opera's production of Franz von Suppé's Gorgeous Galatea in Sydney and was "Young Heidi" in The Production Company's production of Stephen Sondheim's Follies in Melbourne.
In 2008, Mary-Jean was the first recipient of the Australian International Opera Award (AIOA), a scholarship to study at Cardiff University's acclaimed International Academy of Voice (CIAV) in Wales, directed by the renowned tenor Dennis O'Neill, CBE.
Mary-Jean was the First Prize winner of the 2013 Paris Opera Awards. She was a finalist for the Stuart Burrows International Vocal Competition in June 2011 as well as for the 10th Aragall Singing competition in Sabadell, Spain in 2010. She was a finalist for the Australian Singing Competition Mathy Award in 2007 and the winner of the ABC Symphony Australia Young Vocalist Award in 2007.