Fr. Deo earned several degrees from traditional brick and mortar schools.
His academic achievements include the following degrees:
Bachelor of Secondary Education major in General Science (BSEd)
Master of Arts in Teaching General Science (MAT)
Master of Arts in Religious Studies (MA)
Doctor of Philosophy in Religious Studies (Ph.D.)
He took up non-credit online courses with renowned Biblical theologians like N.T. Wright, Scott Duval, Daniel Hays, Talmudic scholar Barry Scott Wimpfheimer, Harvard Divinity Bible Professor Karen King, and Harvard Religious Literacy expert Diane Moore. He also studied with some Jewish rabbis.
He completed a Verified Certificate track studying sacred texts of various religions (“World Religions through Their Scriptures series) from HarvardX (Harvard University online learning). He also studied with the Israel Institute for Biblical Studies (in collaboration with the Hebrew University of Jerusalem) and Aish Academy (a division of Aish Ha Torah, Jerusalem).
Fr. Deo is a regular contributor to various publications in the Philippines and USA.
He is a member of learned societies like American Academy of Religion (AAR), Society for Biblical Literature (SBL), Catholic Biblical Association of the Philippines (CBAP) and the Philippine Association of Catholic Religious Educators (PACRE).