In 1867, at age 21, he became minister of the Borough Synagogue in Walworth, London (now closed; amalgamated with Brixton Synagogue, 1961). As above, during this time he taught at Jews' College School full-time, and was, for a time, its headmaster. He moved to the New West End Synagogue in 1878, and remained the minister there until his death. As a preacher "Singer showed rare gifts". His pulpit addresses in general won wide appreciation, and his services were often called for at public functions. He was the first to introduce regular sermons to children. "Despite his devotion to public work", Singer published some important works; see below