 Mary-Elizabeth Brown has led orchestras under the direction of conductors Lorin Maazel, Kryszstof Penderecki, Carlos Miguel Prieto, Helmuth Rilling, Isaac Karabtchevsky, Placido Domingo and others.She served as concertmaster of YOA Orchestra of the Americas from 2006-2008, led the Britten-Pears Orchestra (at the Aldeburgh Festival) from 2007-2009 and was concertmaster of the chamber orchestra Sinfonia Toronto from 2007-2015.She holds concurrent posts as Concertmaster of both McGill Chamber Orchestra and the Ottawa Symphony Orchestra.