His dissertation, rooted in systematic and spiritual theology, explored the role of the Holy Spirit for salvation through the lens of the writings of St. Teresa of Avila. André previously taught philosophy and Church history in Port-au-Prince (Haiti) at the Grand Séminaire Notre-Dame and the School of Theology for Religious (CIFOR). In complement to his scholarly work, he has been committed to youth ministry as a chaplain, retreat director and vocation promoter.