sentences:  This along with references from his scientific colleagues resulted in his security clearance being reinstated by the Industrial Employment Review Board, which ruled that there was insufficient evidence that he had ever had communist sympathies.This allowed Parsons to obtain a contract in designing and constructing a chemical plant for the Hughes Aircraft Company in Culver City.Von Kármán put Parsons in touch with Herbert T. Rosenfeld, President of the Southern Californian chapter of the American Technion Societya Zionist group dedicated to supporting the newly created State of Israel.