 In 1990, Emerson demerged its Government and Defense Group (including Hazeltine) to form ESCO Electronics Corporation.In 1996, Hazeltine was acquired from ESCO by GEC-Marconi Electronic Systems Corp., a US subsidiary of The General Electric Company, and renamed GEC-Marconi Hazeltine.ESCO was represented by investment banking firm Quarterdeck Investment Partners, Inc. in a deal which valued Hazeltine at $110 million.