He was known as John through early adulthood, and was educated at St. Anthony’s Preparatory School in Hampstead, then Clifton College and Bristol University.
During this period, O'Brien also wrote The Rocky Horror Show, with informal collaboration of Sinclair and Leighton.
[7] (While Foreigner was later remixed at Atlantic Records' studios, Sinclair retained the production credit on the album's release.)
[4] In the 1990s, he worked with Richmond Shepard to develop and stage a show, Lord Buckley's Finest Hour.
[1][6] However, he remained secular until 1987, when he visited Israel, became enamored of Torah study, and decided to move to Jerusalem.
He regularly lectures in Talmud and philosophy at the Ohr Sameach yeshiva's Tannenbaum College of Jewish Studies.