Sean Sullivan, 58

Sales executive Sean Sullivan, 58, of New Canaan CT, passed away on Saturday, November 13 at Mt. Sinai Hospital in New York City. His cause of death was post-surgery complications arising from the removal of a brain tumor. Sullivan – affectionately known as “Sully” – was a pioneer in the securities trading technology industry, and a gifted salesman, with a career spanning over three decades and throughout unprecedented innovation across the industry. Sean was the beloved son of his predeceased parents Thomas J. Sullivan, Marianne Sullivan, and Patricia M. Sullivan.