LAFOX, Ill.--(BUSINESS WIRE)--Richardson Electronics, Ltd. (NASDAQ: RELL) today announced that Kathleen S. Dvorak will be retiring as the company’s Executive Vice President and Chief Financial Officer once a successor is named. "Kathy joined Richardson Electronics in 2007 during a very challenging period for the company. During her tenure, she has been instrumental in helping the company significantly reduce its operating expenses. In addition to serving as a member of the Executive team, Kathy