Steve Rubinow

Steve Rubinow, exec-utive vice president and CIO of NYSE Euronext, the largest exchange on the planet, loved physical science growing up. "I expected my career would be that of a scientist. It turned out to be more computer science and management science than physical science," he explains. But before he took those turns on life's highway, he earned three degrees in chemistry. "For science work, you need a PhD," he says. "It's like a union card." Don't ask about his class rankings; you'll want