Gregory earned a Ph.D. in Ireland, specializing in social philosophy and studying the cultural, historical, and spiritual dynamics that have shaped the Celtic world.​

In particular, his work focuses on Celtic spirituality, examining its ongoing legacy and its potential to contribute to theological and spiritual revitalization in the post-Christian era.

Additionally, his university teaching in Dublin gave him firsthand experience in the transmission and renewal of Celtic traditions.

By synthesizing his lived experience in Ireland, his philosophical expertise, and his Celtic heritage, Gregory has emerged as an authentic voice in understanding the relationship between Celtic culture, spirituality, and the roots of communal identity in Ireland, the British Isles, and beyond.