After beginning a career as a Wall Street stockbroker, he moved into public service by volunteering for his community board and working for then-city comptroller Elizabeth Holtzman. In 2004, Duane completed Harvard University's John F. Kennedy School of Government program for Senior Executives in State and Local Government as a David Bohnett LGBTQ Victory Institute Leadership Fellow.
After beginning his career as a Wall Street stockbroker, he transitioned to public service by volunteering for his community board and working for then-city comptroller Elizabeth Holtzman. In 2004, Duane completed Harvard University's John F. Kennedy School of Government program for Senior Executives in State and Local Government as part of the David Bohnett LGBTQ Victory Institute Leadership Fellowship.