An assembly at SigmaTron International doesn't mean fraternizing over a keg. The company manufactures electronic components, printed circuit board assemblies, and box-build (completely assembled) electronic products on a contract basis for customers in the appliance, automotive, consumer electronics, fitness equipment, industrial electronics, and telecommunications industries. SigmaTron also offers design, testing, shipping, and storage services. Major customers include electronic controls manufacturer Spitfire Controls and fitness equipment maker Life Fitness - together nearly half of sales. SigmaTron has grown through a series of acquisitions. The company has facilities in China, Mexico, Taiwan, and the US.