SUNNYVALE, Calif., April 14, 2009 (GLOBE NEWSWIRE) -- Dionex Corporation (Nasdaq:DNEX) today announced that Dr. Frank Witney will become its President, Chief Executive Officer and a member of its Board of Directors, effective April 30, 2009. Dr. Lukas Braunschweiler, who has been serving as President and Chief Executive Officer since 2002, resigned in order to accept a new position as Chief Executive Officer of Ruag Holding AG, a Switzerland-based aviation, defense and technology company.