Simon Aerials was the base manufacturing company for all US production of Simon aerial boom and scissors lifts. Simon was also the corporate parent of the Skywitch scissors lift manufactured in Ellwood , PA. and Bowerston, PA. coupled with the former Roto Zoom boom lift manufactured and imported from Canada.
The Terex Corporation bought certain businesses of Simon Engineering P.L.C.'s Simon Access division. The units sold were Simon-Telelect, Simon Aerials Inc., Simon Aerials Ltd., Simon-Cella, and the Simon-R.O. Corporation. They make truck-mounted cranes and aerial work platforms.