In 1969, as part of Israeli efforts to overcome the French weapons embargo after the Six-Day War, Wertheimer founded ISCAR Blades which later became Blades Technology Ltd. – one of the largest manufacturers of blades and vanes for jet engines and industrial gas turbines. Today, Blades Technology's customers include Pratt & Whitney, Rolls-Royce, Snecma, General Electric, MTU Aero Engines, Techspace Aero, Solar Turbines, and others.