Rob Horn, Senior Managing Director. Mr. Horn is a Senior Managing Director of Blackstone and is Co-Head of Energy Investing for GSO Capital Partners. Mr. Horn sits on the investment committees for GSO’s energy funds, performing credit funds and distressed funds. Prior to joining GSO, Mr. Horn worked in Credit Suisse’s Global Energy Group, where he advised on high yield financings and merger and acquisition assignments for companies in the power and utilities sector. Mr. Horn serves on the board of directors of various companies involved in the upstream, midstream and oilfield service sectors, including GeoSouthern Haynesville, Indigo Haynesville, Delaware Basin Investment Group, M5 Midstream and Compass Well Services, among others. Mr. Horn graduated with academic honors from McGill University.