2003-2005 Ring-Engineering Ltd. Design and Commisioning- Flow fields research and crystallization models development 1991-1995 Israely Ministry of Defence-Research Unit-Head of Weapon Section1987-1989 Israely Ministry of Defence-Research Unit-Head of Protection Section 1984-1987 Israel Aerospace Industries Ltd.-Mechanical Engineer1983-1984 I.D.F-Israely Navy-Machines Branch-Officer Engineer 1982-1983 I.D.F-Merkava Development Unit-Officer Engineer1981-1983 I.D.F-Industry Equipment Department-Officer Engineer1979-1981 I.D.F: Lascov Development Unit-Officer Engineer1976-1978 I.D.F: Israely Navy-Technical Boarding School-Instrumentation and Control- Stream Commander1975-1976 I.D.F: Israely Navy-Missile Ship Weapon Systems-Arming Officer