CAMBRIDGE, Mass., Aug 26, 2008 (BUSINESS WIRE) -- Helicos BioSciences Corporation (NASDAQ:HLCS) today announced that Bill Efcavitch, Ph.D., has been named Helicos chief technology officer, Marc Levine has joined Helicos as senior vice president of product development and Stan Letovsky, Ph.D. has joined as vice president for scientific informatics -- three personnel moves aimed at accelerating the company's research and development program.