Fristam Pumps USA, Middleton, Wis., said Armando Diaz joined the company as bilingual applications engineer. In this position, Diaz will provide technical support and customer assistance to Fristam’s Latin American customers.

 Alchemy Systems, Austin, Texas, hired Christine Mills as senior vice president of global sales and marketing. Industry Relations Manager Laura Dunn Nelson was promoted to vice president of technical services & business development. Alchemy Systems offers food safety training.