Invensys Rail Group is a designer, manufacturer and integrator of railway equipment, including automation, signalling and controls. It is a division of Invensys, a UK-based multinational engineering company. The group is headquartered in Chippenham, Wiltshire, and as of 2005[update], had over 2750 employees in 14 locations internationally. It operates through four companies:
The other part of Westinghouse Brake and Signal Company, Westinghouse Brakes Ltd, was sold by Invensys to Knorr-Bremse, and has since left the Chippenham site to set up in the nearby town of Melksham.
On 28 November 2012, Invensys agreed to sell its rail arm to Siemens AG for £1.7bn; the sale was completed 2nd May 2013.