Joshua L. Steiner serves as co-chairman with Glenn Dubin of the Board of Castleton Commodities International LLC. He is a senior adviser at Bloomberg, L.P., where he was previously Head of Industry Verticals. Prior to joining Bloomberg, Mr. 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 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.