Gregoris went into filmmaking through electrical engineering. Finishing his MEng at Imperial College London he shifted into film directing and got his MFA from California Institute of the Arts.
After a number of awarded music videos, he started directing TV commercials in 2016 for brands such as Ford, Aegean Airlines, Nestle, Unilever and Barilla receiving over 20 local awards including a Grand Ermis in Production as well as an Epica in 2016.
Parallel to his commercial work, he has taught Acting on Camera at the Athens Conservatory School of Drama. He is currently in production on his first feature film.