He frequently lectures on Church/State separation issues and his participation in interfaith forums provides him with the opportunity to clarify the Humanist perspective. In a Las Vegas Review-Journal article, Lipman stated: "My biggest concern is to counter the propaganda from people who think that people who don't believe in a supernatural deity cannot live moral, ethical lives." Lipman says his top priority "is to change people's attitudes about Humanists". "It is not OK", says Lipman, in the Review-Journal article, "to discriminate against somebody simply because they do not believe in God".
Lipman is the immediate past president of the American Humanist Association and remains active in many of its activities. He is a trustee and treasurer of The Humanist Foundation (the American Humanist Association's endowment fund) and is a co-mentor of the 2012 class of the Humanist Institute.
He is a former vice-president of the International Humanist and Ethical Union and is one of the founders, a past president, and a current board member of the Humanist Association of Las Vegas and Southern Nevada.
Lipman is a past president and former member of the Unitarian Universalist Congregation of Las Vegas and he is a "fellow" at the Unitarian Universalist Humanist Symposium.
He is a Humanist Minister, licensed in Nevada to officiate at marriage ceremonies and he is a board member of the Interfaith Council of Southern Nevada.
He is a former board member of the Nevada Civil Liberties Union and serves as an advisory board member of Scouting for All.
Mr. Lipman lives in Las Vegas, Nevada, is married to Anita Lipman, and they have two children and three grandchildren.
His daughter, Lori Lipman Brown is a former member of the Nevada State Senate, former director of the Secular Coalition for America, and co-mentor (with Mel Lipman) of the Humanist Institute class of 2012.