Congregation Adat Ari El was a Jewish Reform congregation in Las Vegas, Nevada founded by former members of Temple Beth Am in 1992. The congregation started out with about 15 families that held services in a donated storefront every two weeks, led by a rabbi who traveled from California. In 2007, Adat Ariel merged with Temple Beth Am to form Temple Sinai.

Temple Beth Am was a Jewish Reform congregation founded by Rabbi Mel Hecht in 1984 in Las Vegas, Nevada. In 1992, some members of the congregation, unhappy with Rabbi Hecht's leadership, broke off to form Congregation Adat Ari El. Construction on Beth Am's campus began in Summerlin in 2001. In 2007 Temple Beth Am and Adat Ari El merged to form Temple Sinai.

Rabbi Malcolm Cohen was born on October 7, 1973 in London, England. His mother worked as an office assistant, and his father ran a bookshop and also prepared youth for their bar and bat mitzvahs. It was his father’s dedication to Jewish education and service that influenced his career path. After earning a degree in psychology from Southampton University, Cohen went on to get a professional qualification in youth and community work.