Greenwald has served in the New Jersey General Assembly since 1996, where he represents the 6th legislative district. He has been the Assembly's Budget Committee Chair since 2002 and was the Assistant Minority Leader from 1998-1999. As well as serving on the Assembly Budget Committee, he also services on the Joint Budget Oversight Committee (as Vice Chair) and on the Appropriations Committee. Assemblyman Greenwald is a member of the Camden County Bar Association, the Camden County Democratic Committee and the Camden County Traffic Safety Task Force Committees. He is a member of the CEO/Executive Advisory Board for the Southern New Jersey Council Boy Scouts of America. Greenwald graduated with a B.A. in 1989 from Moravian College in Political Science and was awarded a J.D. in 1992 from the Seton Hall University School of Law. He resides in Voorhees Township.