Mark Challis is currently the Director of Debt Finance at OakNorth, a position they assumed in 2024. Previously, they held roles at Aon between 2022 and 2024, and as Director at Santander UK from 2018 to 2022. Mark also served as a Senior Executive in Transaction Support at Ernst & Young from 2005 to 2011 and held the role of Audit Executive at Grant Thornton LLP from 2002 to 2005. Additionally, they were Director of Financial Sponsors at RBS from 2015 to 2018 and Associate Director in Structured Finance Transactions prior to that.
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