kumin worked at lazard asset management and sanford bernstein before joining sac capital, where his roles included head of business development and subsequently chief operating officer under steve a. cohen. upon kumin leaving in 2014, cohen went on to say that he (kumin) had "been responsible for transforming our business development and investor relations functions and has helped create our global strategy and footprint. without his tireless work, we would not have had a strong london presence or our current business in asia."