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Marconi Space and Defence Systems

Marconi Electronic Systems Limited
Fate Merged with British Aerospace
Successor BAE Systems
Founded 20 July 1897 (as Marconi Company)
Defunct 30 November 1999
Headquarters Chelmsford, England
Key people
Guglielmo Marconi
Parent The General Electric Company

Marconi Electronic Systems (MES), or GEC-Marconi as it was until 1998, was the defence arm of The General Electric Company (GEC). It was demerged from GEC and acquired by British Aerospace (BAe) on 30 November 1999 to form BAE Systems. GEC then renamed itself Marconi plc.

MES exists today as BAE Systems Electronics Limited, a subsidiary of BAE Systems, but the assets were rearranged elsewhere within that company. MES-related businesses include BAE Systems Submarine Solutions, BAE Systems Surface Ships, BAE Systems Insyte and Selex ES (now a part of Leonardo-Finmeccanica).

MES represented the pinnacle of GEC's defence businesses which had a heritage of almost 100 years. Following GEC's acquisition of Marconi as part of English Electric in 1968 the Marconi brand was used for its defence businesses e.g. Marconi Space & Defence Systems (MSDS), Marconi Underwater Systems Ltd (MUSL). GEC's history of military products dates back to World War I with its contribution to the war effort then including radios and bulbs. World War II consolidated this position with the company involved in many important technological advances, most notably radar.

Between 1945 and GEC's demerger of its defence business in 1999, the company became one of the world's most important defence contractors. GEC's major defence related acquisitions included Associated Electrical Industries in 1967, English Electric Company (including its Marconi subsidiary) in 1968, Yarrow Shipbuilders in 1985, parts of Ferranti's defence business in 1990, Vickers Shipbuilding and Engineering in 1995 and Kvaerner Govan in 1999. In June 1998, MES acquired Tracor, a major American defence contractor, for $1.4bn.


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