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Cristina Ramirez is a seasoned finance professional with extensive experience in financial management and reporting. Currently serving as Senior Finance Manager at Liberty Oilfield Services since March 2021, Cristina previously held multiple roles at Schlumberger from December 2000 to February 2021, including Controller for Operational Planning & Resource Management and Supply Chain, where responsibilities encompassed financial management for a $10 billion Product Line. Additional roles at Schlumberger included Controller for Supply Chain, Transfer Pricing - Tax Manager, and overseeing financial management for ten Legal Entities. Prior to Schlumberger, Cristina was an Audit Manager at Arthur Andersen & Co., focusing on auditing and financial statement accuracy across various industries. Educational qualifications include a degree in Commercial Engineering from Pontificia Universidad Católica del Ecuador and an MBA in Project Management from Escuela Politécnica Nacional.