 Groner is a co-author, with Rabbi Volf Greenglass of Montreal, of "Sefer HaMinhagim", the authoritative book describing Chabad-Lubavitch customs.He was also an editor of Otzar HaChasidim, the editorial group that publishes works on Chabad Hasidut.He taught at Beth Rivkah in Crown Heights, a school for girls who are part of the Chabad-Lubavitch community.