Dan is a board member of Repair the World (Jewish engagement through service) and the Friends of the Arava Institute (bringing Arabs and Jews together in Israel to address environmental and climate issues). He is a long-time member of Temple Emanuel and has, over the years, volunteered with other Jewish organizations, including Combined Jewish Philanthropies, JCDS, the Newton Centre Minyan, and Our Generation Speaks.
In his free time, Dan created a software package for calculating income tax, as well as software to help attorneys and individuals with the financial aspects of divorce.