Founded in 1914, Ziegler is a dealer of engine and construction equipment that is manufactured and marketed under the Caterpillar brand. The company provides sales and rentals of new and used construction equipment, agricultural equipment, global positioning systems and power systems. It offers loaders, excavators, combines, headers, sprayers, guidance systems, tractors and generators. Its GPS products are used for surveying and construction. In addition to equipment, the company offers sales of replacement parts. Ziegler maintains locations in Altoona, Sioux City, Fort Dodge, Mason City and Postville, Iowa; Columbus, Wis.; and Jackson, Saint Cloud, Shakopee, Fergus Falls, Rochester, Duluth, Maple Grove, Marshall, Buhl, Crookston and Bloomington, Minn.