John C. G. O'Leary founded Vantage Energy Services, Inc.
He occupies the position of Chairman at Excel Marco and Chief Executive Officer at Strand Energy.
He is also on the board of Kahn Scheepvaart BV, Jumbo Shipping VOF and TechnipFMC Plc and Regional Vice President at International Association of Drilling Contractors.
He previously was Partner at Pareto Offshore ASA, President & Vice President-International Marketing at Pride International LLC (Texas), Vice Chairman-Marketing at Forasol-Foramer NV and Director at Vantage Energy Services, Inc.
He received an undergraduate degree from University College Cork, a graduate degree from Trinity College Dublin and an undergraduate degree from IFP Energies Nouvelles.