Raytheon Technologies Corp. is an aerospace and defense company, which engages in the provision of aerospace and defense systems and services for commercial, military, and government customers. The company is headquartered in Arlington, Virginia and currently employs 182,000 full-time employees. The firm's operations are classified into four principal business segments: Collins Aerospace (Collins), Pratt & Whitney, Raytheon Intelligence & Space (RIS) and Raytheon Missiles & Defense (RMD). Its Collins segment is a provider of technologically advanced aerospace and defense products and aftermarket service solutions for aircraft manufacturers, airlines, and regional, business and general aviation, as well as for defense and commercial space operations. Pratt & Whitney is engaged in supplying aircraft engines for commercial, military, business jet and general aviation customers. RIS segment is a provider of integrated space, communication and sensor systems, and cyber and software solutions to intelligence, defense, federal and commercial customers. RMD segment is a provider of end-to-end solutions for United States and foreign government customers designed to detect, track and engage threats.