Jeffrey Grenfell-Hill trained for the professional theatre at the Bristol Old Vic Theatre School, where he was chosen to be student director in the final year. After a tour of American colleges, universities and performing arts centres, he was invited to join the examining board of the London Academy of Music and Dramatic Art.

His poems have appeared in Penguin and Heinemann anthologies. Samuel French have published his plays, and his monologues for young actors have been published by Oberon Books in an anthology edited by Shaun McKenna. His monologues and duologues have been chosen for the LAMDA examination syllabus for the acting exams as 'setpieces'. They are often performed as 'own choice' selections at major festivals of Speech and Drama. Jeffrey himself is an adjudicator of many years' standing with a doctorate from the University of Wales. He was Director of Sixth Form Studies at St George's School, Harpenden, where he taught A/S and A level Theatre Studies.

Jeffrey remains an examiner for the London Academy of Music and Dramatic Art and in this capacity examines both in the UK and overseas.