1989-91, Lecturer and Asst Researcher, Dept of Applied Hydrogeology, Inst. Für Geotechnik und Umweltfragen, Sternberg; 1990-91, Hydrogeologist and Groundwater Modeller, Büro für Geotechnik und Umweltfragen; 1991-92, Researcher, Water Research and Study Center, Univ. of Jordan; 1991-95, Project Manager, Qa-Disi Aquifer Study, Water Authority of Jordan (WAJ)/Ministry of Water and Irrigation (MWI), Jordan; 1994-98, Project Manager, Wadi Araba Deep Groundwater Aquifer Study, Jordan Valley Authority (JVA)/MWI; 1995-98, Coordinator, Regional Water Supply and Demand Study, German Technical Cooperation (GTZ)/MWI; since 1995, Project Manager, Disi-Mudawwara Water Conveyance Feasibility, Design and BOT Study for Amman Water Supply, WAJ/MWI, Jordan; 1996-99, Coordinator, Regional Water Data Bank, USAID-EU/MWI, Jordan; 1996-99, Coordinator, National Water Master Plan, GIS, Balance Models, Data Banking, German Technical Cooperation/MWI, Jordan; 1997-99, Asst Secretary-General to Water Resources Development, MWI, Jordan; 1999-2001, Secretary-General, MWI, Jordan. 2001, Minister of Water and Irrigation of Jordan; currently, Consultant, World Bank.