A non-profit agency usually referred to as non-governmental organizations (NGOs) is a non-profit and voluntarily inclined groups which is independent of governmental influence and policies. They're usually set-up for humanitarian purposes.
In this scenario, a Jewish religious leader called a rabbi teaches classes about the Hebrew Bible in a place of Jewish worship called a synagogue. Thus, the rabbi is most likely employed by a nonprofit organization.
Some other examples of non-profit organizations are Better Business Bureau, Consumers Union etc.
