Sulzer Ltd. is a Swiss industrial engineering and manufacturing firm, founded by Salomon Sulzer-Bernet in 1775 and established as Sulzer Brothers Ltd. in 1834 in Winterthur, Switzerland. Today it is a publicly traded company with some 180 manufacturing facilities and service centers around the world. The company's shares are listed on the Swiss Stock Exchange.

Winterthur is a city in the canton of Zürich in northern Switzerland. With over 110,000 residents, it is the country's sixth-largest city by population, as well as its ninth-largest agglomeration with about 140,000 inhabitants. Located about 20 kilometres (12 mi) northeast of Zürich, Winterthur is a service and high-tech industrial satellite city within Greater Zürich.