
ND Maduemezia is vice president of Investor Relations, a position he assumed in July 2020. Before that, he served in diverse field and management roles across multiple business lines and geographies most recently as Geomarket manager for Sub-saharan Africa. ND's career spans management responsibilities and exposure to multiple product lines from drilling, reservoir characterization to production and across North America, Europe, Africa, Asia and the Middle East; including assignments as vice president Europe and Africa for Drilling & Measurements; vice president Europe and Africa for Geoservices.
Maduemezia holds a Master of Science in Oil and Gas Management from Edinburgh Business School, Heriot-Watt University, UK and Bachelor of science degree in mechanical engineering from University of Lagos.

Joy V Domingo is Director of Schlumberger’s Investor Relations, a position he assumed in July 2011. He has 33 years of experience in international finance, 27 years of them with Schlumberger holding various capacities within its corporate headquarters in Paris & Houston, and across its key business segments (i.e. Oilfield Services, Drilling & Measurements, WesternGeco and formerly with Sedco Forex). Worked in a variety of global and geographical assignments in North America, Europe & Russia, and Asia-Pacific and held roles such as Global Segment Controller (Finance Director), Global Consolidations Manager, Area/Region Operations Controller, GeoMarket Tax Manager, and currently Director of Investor Relations. Prior to Schlumberger, 6 years of experience with KPMG Peat Marwick and SGV Ernst & Young, with experience in oil & gas, mining, manufacturing, pharmaceutical, and technology audit practices mainly in the Asia-Pacific.
Domingo holds a Bachelor of Science degree in Business Administration and Accountancy from the University of the Philippines, a Philippine CPA, a graduate of The General Management Program at Harvard Business School in Boston, and participated in advanced finance programs at IMD International, Lausanne, Switzerland, and at Wharton School, University of Pennsylvania.