Nader Al-Khateeb served as Chief Engineer for Bethlehem, Beit Jala and Beit Sahour Water Authority from 1984 to 1993. From 1994 to 1997, he was a senior water resource engineer with UNDP's Water Resources Action Program, working to formulate and establish the Palestinian Water Authority (PWA). He coordinating a host of water and wastewater projects, and served as a consultant to international development organizations working in the water sector. He carried out feasibility studies for the industrial waste management sector in Hebron under USAID, worked with UNESCO to prepare an Emergency Master Plan for the Bethlehem Region and trained municipal engineers in the Gaza Strip on wastewater collection and treatment systems with the German group Carl Duisberg Gesellschaft. He holds professional memberships with the Jordan Engineers Association, Israel/Palestine Center for Research and Information, Palestinian Technical and Advisory Committees on Water for the multilateral negotiations.