Born in San Antonio, Texas, Rabbi Klein was raised in the Reform Movement where he was an active member in local, regional, and national youth activities, all of which helped build his sense of Jewish pride and Jewish identity, leading to his desire to become a rabbi.   Rabbi Klein attended the University of Texas, receiving a B.A. with honors in Psychology and also Elementary Education certification in 1974. He taught in the Houston independent School District and also ran a business in Houston before realizing his lifelong dream and entering rabbinical school in 1996.  

Rabbi Klein's rabbinic experiences as a student at the Hebrew Union College New York campus included: serving as student rabbi for Beth Chaverim Reform Congregation in Ashburn, Virginia for 4 years; receiving a CLAL (Center for Learning and Leadership) rabbinic fellowship to study texts weekly in a pluralistic Jewish setting; coordinating the Gay/Lesbian outreach program for the Jewish Community Center on the Upper West Side for 2 years; teaching a 30-week Derekh Torah Intro to Judaism course for the 92nd St. Y; and receiving CPE (Clinical Pastoral Education) certification in an interfaith setting at New York University Medical Center.

Rabbi Klein received his Masters of Arts in Hebrew Literature from Hebrew Union College in 2000 and was ordained in 2001.   After ordination, Rabbi Klein served as the assistant Rabbi at Hevreh of Southern Berkshire in Great Barrington, MA, where he worked with Rabbi Deborah Zecher, Hevreh's senior rabbi. In 2003, Rabbi Klein became Hevreh's associate rabbi, a position he held until June of 2007. Rabbi Klein's tenure encompassed all facets of congregational life, with special areas of interest including: partnering with lay leadership to restructure administrative aspects of the congregation; initiating a capital campaign; developing curriculum; teaching kids in the religious school; leading junior and senior youth groups; teaching extensive adult education series; reaching out to boarding school students and nursing home residents; participating in the Southern Berkshire Interfaith Clergy Association; and writing columns for local newspapers.  

A lover of ongoing education, Rabbi Klein studied at the Shalom Hartman Institute in Jerusalem during the summer of 2004. In 2005, Rabbi Klein was selected to be part of the STAR (Synagogues: Transformation and Renewal) Peer Program. This innovative training teaches rabbis to integrate spiritual leadership with skillful management principles in an interdenominational setting. He remains active in their alumni program today.  Rabbi Klein lives with his husband, Adam Mastoon, a nationally published editorial photographer, in Barrington, Rhode Island.