Founded in 1955, Williams International is one of the leading, privately owned companies in the world that develops and manufactures a range of is small gas turbine engines. The company offers the FJ44-4 turbofan engine. It provides products from several manufacturers, such as Nextant Aerospace, Diamond Aircraft, Hawker Beechcraft Corporation and Rockwell Collins. Williams International serves clients in the aviation, industrial and military markets. The company administers a total assurance program. It has a design-to-production facility in Ogden in Utah.