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 starting a 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 a David Bohnett LGBTQ Victory Institute Leadership Fellow.