He later served as rabbi and spiritual leader in a number of cities, including Libau in Latvia, Salant in Lithuania, and Kobryn in Belarus. In 1904, Rabbi Atlas was appointed rabbi to the community of Shavel.
Later on, he held positions as a rabbi and spiritual leader in several cities including Libau in Latvia, Salant in Lithuania, and Kobryn in Belarus. In 1904, Rabbi Atlas became the rabbi for the Shavel community.