Grant Thornton adds Oliver Dennison to expand financial services consulting capabilities


Oliver DennisonNEW YORK—Oliver Dennison has joined Grant Thornton LLP as a managing director in the firm’s Financial Services Advisory practice. Based in Grant Thornton’s New York office, he will be responsible for delivering integrated services to global banking clients and driving fintech-enabled business solutions, with a focus on risk and compliance.

Dennison has nearly 20 years of experience as a senior manager and technology consultant, working for financial organizations and multinational corporations in Europe and North America. Most recently, he was a director leading the Enterprise Risk Technology function within Deutsche Bank Americas.

“Having spent his career in financial services, Oliver has witnessed rapid, technology-driven industry change,” said Nigel Smith, national Financial Services Advisory leader for Grant Thornton. “His experience leading the re-engineering of business processes and catalyzing change through technology is a strong addition to our solutions-focused client approach, especially as fintech continues to transform financial services.”

Before Deutsche Bank, Dennison was director of CFO Program Services for Credit Suisse and spent nine years at RBS Global Banking & Markets, where he was the managing director leading change management and the Americas RBS/ABN Amro NV post-acquisition integration program. He also served as global head of banking and lending technology, and ultimately ABN Amro NV branch manager and chief administrative officer for RBS/ABN Amro NV Americas. He began his professional career as a consultant for Druid Systems, BT Syntegra and Rule Financial.

Graham Tasman, principal and Banking sector leader for Grant Thornton, added, “Oliver’s mastered the art of applying practical process and technology solutions to business challenges to offer companies measurable return – a skill set we must continue to grow for our banking and broader financial services clients.”

Dennison holds a civil engineering bachelor’s degree, with honors, from Imperial College London.



About Grant Thornton LLP

Grant Thornton LLP (Grant Thornton) is one of America’s largest providers of audit and assurance, tax and advisory services — and the U.S. member firm of the Grant Thornton International Ltd global network. We go beyond the expected to make business more personal and build trust into every result. With revenues of $2.4 billion for the fiscal year that ended July 31, 2023, and almost 50 offices nationwide, Grant Thornton is a community of more than 9,000 problem solvers who value relationships and are ready to help organizations of all sizes and industries create more confident futures. Because, for us, how we serve matters as much as what we do. 


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