Rolls-Royce Holdings
Derby's two biggest employers, Rolls-Royce Holdings and Toyota, are engaged in engineering manufacturing. Other companies of note include railway systems engineering firm Bombardier Transportation, who manufacture railway rolling stock at Derby Litchurch Lane Works (acquired by Alstom in 2021); First Source, who deal with much of Sky's telephone support; and Triton Equity, who took over Alstom's manufacturing plant for large power plant boilers and heat exchangers in 2014.