Dean O'Hare, the Chubb CEO who led the insurer into the 21st century, has died, the company said today. He was 75 years old. O'Hare began his career at Chubb as an underwriting trainee in 1963 and eventually served as a financial analyst and assistant to Percy Chubb II, a descendent of the New Jersey-based company's founder, Chubb said. O'Hare rose to CFO in 1981,president in 1986, and chairman and CEO in 1988, a position he held until 2002.. After his retirement from the company, O’Hare continued to share his business insights with several companies, including H.J. Heinz Co., AGL Resources, Bolt Solutions and Fluor Corp. He brought his expertise to bear for the causes and organizations about which he cared deeply— as co-chairman of the Hospital for Special Surgery in New York, a trustee of St. Benedict’s Preparatory School in Newark, N.J., a fellow of the New York Academy of Medicine, a trustee of the Intrepid Sea, Air & Space Museum and a trustee of the University of Dublin.