Fr. Bertrand Buby is a member of the Society of Mary, also known as the Marianists. He teaches courses on Mary at the International Marian Research Institute at the University of Dayton and is Professor Emeritus at the University of Dayton. Fr. Bert is past president of the Mariological Society of America and is a member of the Pontifical International Marian Academy. He is the author of the trilogy Mary of Galilee, Mary Faithful Disciple, With a Listening Heart, and also a book on his founder's use of Marian texts.

Fr. Bert obtained his licentiate in Scripture from the Pontifical Biblical Institute and his doctorate in Marian Theology from the International Marian Research Institute at the University of Dayton.