Gen-Probe announced that Carl W. Hull has formally succeeded the company's long-time leader, Henry L. Nordhoff, as CEO. Hull, formerly Gen-Probe's president and COO, also has joined the Company's board of directors. As first announced on March 23, Nordhoff retired as CEO. Nordhoff, who had served as Gen-Probe's CEO since 1994, is now non-executive chairman following his re-election to the board at the Company's annual meeting of stockholders last week.