Mariana Valentina Petre is a Specialist in Gas Planning at ADNOC, bringing more than eleven years of experience across gas, LNG, petrochemicals and European refining value chains. She specializes in value chain optimization, linear programming modelling, shutdown alignment, scenario analysis and digital transformation. At ADNOC, Mariana co-develops strategic planning and optimization platforms, including VAST, SHAMS, ISP and VALOR, translating complex business requirements into practical tools that strengthen planning and operational decision-making. Her work includes cross-functional stakeholder alignment, functional specifications, user acceptance testing, governance, training and executive-level analysis. She previously held planning and economics roles at OMV Petrom and Lukoil. Mariana holds master’s and bachelor’s degrees in chemical engineering from the Petroleum and Gas University Romania. She has published technical papers, presented at industry conferences, and serves as an ADIPEC Ambassador, promoting knowledge exchange, innovation, digital progress and collaboration across the energy industry.