Having trained at Mass College of Art, the School of the Boston Museum of Fine Arts, the Art Institute of Boston, and the Aegean School of Fine Arts in Paros, Greece, as well as at The Landscape Institute (LI) at the Boston Architectural College, Grealish’s creative work ranges from a studio practice with tradtional materials used in unique and innovative ways to environmental installations and earthworks.

His fascination with the Greek myth of Daedulus and the Minatour, and its themes of love, revenge, loss, betrayal, transformation and hope have resulted in the installations of numerous ceremonial labyrinths.