Donal Gallagher Donal Gallagher is President of Acadia’s Quaternion Expert Services and Co-Head of its Quantitative Services division. Prior to Acadia’s acquisition in 2021, Donal was Co-Founder and CEO of Quaternion Risk Management. As a senior financial engineer and risk management professional, Donal acts as an advisor to Chief Risk Officers and Chief Financial Officers, focusing on the transparent pricing and risk management of complex portfolios of financial instruments. Donal complements this advisory work with the development and implementation of sophisticated pricing software. Donal holds a Ph.D. from the California Institute of Technology in Applied Mathematics and an M.Sc. in Mathematical Physics from the National University of Ireland (University College Dublin). Donal is co-author of “Modern Derivatives Pricing and Credit Exposure Analysis”, Palgrave Macmillan, 2015.