Enneagram of Personality
De Roo has a Bachelor of Arts degree in Latin philosophy from the Collège de Saint-Boniface (University of Manitoba). In 1952 he earned a doctorate in sacred theology from the Pontifical University of Saint Thomas Aquinas, "Angelicum" in Rome with a dissertation entitled "Regina in Coelum assumpta : les rapports entre l'assomption et la souveraineté de Marie" (Queen assumed into Heaven : The relationship between the Assumption and the sovereignty of Mary). He also has several honorary degrees and is an Enneagram of Personality teacher.