Joshua L. Steiner, is a senior adviser at Bloomberg, L.P., where he was previously Head of Industry Verticals. Prior to joining Bloomberg, Steiner co-founded and was co-president of Quadrangle Group, LLC, a private equity and asset management firm. Before co-founding Quadrangle, he was a as managing director at Lazard Frères & Co. LLC. From 1993 to 1995 he served as chief of staff for the U.S. Department of the Treasury.
He currently serves on the boards of Yale University and Phillips Academy (Andover). He serves on the boards of Castleton Commodities, Engineers Gate and a number of technology start ups. He is an honorary trustee of the New York Public Library, where he was previously the vice-chair of the board. Steiner received a B.A. in history from Yale and an M.St. in modern history from Oxford University.