ST. PAUL, Minn.--(BUSINESS WIRE)--Minnetronix, Inc., a St. Paul-based medical device design and manufacturing firm, announced that Diane Richard has joined the company as director of human resources. Richard, who earned her executive MBA from the University of St. Thomas, most recently served as director of human resources at the Ordway Center in St. Paul. Diane’s background consists of budgeting and finance, including seven years as a budget analyst in the design department at the National Gallery of Art in Washington, D.C.