The Science Philanthropy Alliance is a coalition of science-oriented advocacy groups. The Alliance is a project of the center-left New Venture Fund, a funding and fiscal sponsorship nonprofit which employs Alliance president Marc Kastner and executive director Valerie Conn.  The New Venture Fund is managed by the Washington, D.C.-based philanthropy consulting firm Arabella Advisors.
In 2016, Marc Kastner’s salary was $531, 250. Valerie Conn’s 2016 salary was $296,179.