David O'Sullivan, CPA, CTA, ACA, is currently the Global Tax Process Performance Owner at SLB, a role they have held since 2025. Previously, they worked at Schlumberger from 2011 to 2013 in various positions, including Financial Accountant for the UK and Continental Europe and Tax Project Manager for Latin America. David also served in multiple capacities such as Geo-market Tax Lead and SAP Tax Technology Deployment Lead during their time at Schlumberger. Before that, they gained experience as an Assistant Tax Manager at PricewaterhouseCoopers from 2008 to 2010.
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