Gregory Halvatzis is a petroleum geologist who resides in Houston, Texas. A native of East Pittsburgh, Pennsylvania, Halvatzis graduated from Waynesburg University with a Bachelor of Science in Geology. In his senior year at Waynesburg, he was selected to “Who’s Who Among Students in American Universities and Colleges.” Holding both a Master of Science in Geology from the University of Florida and an MBA from Mississippi College, Halvatzis also pursued graduate studies in geoscience at the University of Arizona. At the University of Florida, he was inducted into Sigma Gamma Epsilon, the National Honor Society for Earth Sciences.

Halvatzis is licensed as a Professional Geoscientist in both Texas and Louisiana. He is also certified as a petroleum geologist by the American Association of Petroleum Geologists and as a professional geoscientist by the American Institute of Professional Geoscientists. Gregory has served as a Director of the Houston Geological Society. A published author in the field of petroleum geology, Halvatzis has received several publication awards. He served on the Board of Directors of Epsilon Energy, a publicly traded company. He is also the current Chair of the Waynesburg University Board of Trustees. During his career, Halvatzis has worked for several private — as well as publicly- traded oil and gas companies in Oklahoma, Mississippi, and Texas. Positions held by Halvatzis include Southeastern Region Planning & Evaluation Manager at Cities Service (Exploration & Production Group of CITGO) prior to its acquisition by Oxy, Exploration Vice President at First Energy Corporation, Senior Vice President Exploration & Land at TransTexas Gas Corporation and CEO of RHC Energy a publicly traded company. In 2016 he co-founded and is co-owner of Recoil Resources, a private equity backed oil and gas company with production in South Texas.

An active member of Annunciation Greek Orthodox Cathedral in Houston, Texas, for the last 30 years, Halvatzis has been a facilitator in adult education programs at the cathedral, teaching classes in church history, theology, and contemporary issues.

Marie Halvatzis attended the University of Florida and graduated from the University of Tulsa with a Bachelor of Science in Political Science. After graduating from Mississippi College School of Law, she worked in the oil and gas industry and in private practice of law. When the family moved to Houston, Texas, she stayed home to care for their two children and was involved in the children’s activities including serving as President of the PTA at their elementary school. Marie is also active in numerous charities.

Marie has served on the Philoptochos Board at Annunciation Greek Orthodox Cathedral in Houston, Texas for the last twenty years. She served three terms as President of the chapter. Marie currently serves on the Philoptochos Board of the Metropolis of Denver. Also, for the past nineteen years she has served on the Board of Directors of Village Learning Center Inc., an organization providing services to adults with disabilities.