Mary has been engaged in recent seasons by InnerSpace Concerts, The Music Room Chamber Players Series, Nova Scotia Choral Federation, Halifax Summer Opera Festival, Acadia Summer Band Camp, and Saratoga Sings for Seniors (Opera Saratoga). Her recital partners have included mezzo-soprano Christianne Rushton, cellist Rachel Desoer, saxophonist Tristan De Borba, mezzo-soprano Paula Rockwell, flutist Jack Chen, mezzo-soprano Marie Engle, soprano Bethany Hörst, and flutist Melissa Mashner. She is an alumna of several collaborative pianist training programs for Art Song and Opera internationally including Franz-Schubert-Institut (Baden Bei Wein, Austria), Vancouver Opera’s Yulanda M. Faris Young Artists Program, Opera Saratoga, Centre for Opera Studies in Italy (COSI), Sulmona, Italy, Opera McGill, and Opera on the Avalon.

Originally from Kitchener, Ontario, Mary holds performance degrees from Wilfrid Laurier University and McGill University. 

Mary Castello has established herself as a sought-after freelance collaborative pianist, recital partner, and piano teacher in the Wolfville NS area and beyond. Mary has held the position of Staff Accompanist at Acadia University’s School of Music since September 2017, and she has been the accompanist for the Aeolian Singers in Halifax since September 2019. Mary is also an active member of the Nova Scotia Registered Music Teachers’ Association (NSRMTA).