Cory Ellenson is a Managing Director in the US National Tax practice, specializing in  Tax Controversy. Cory has more than 12 years of experience navigating IRS audits and appeals and addressing IRS practice and procedure matters.

Cory represents clients through all stages of IRS audits and appeals, including negotiating and responding to information document requests, negotiating proposed adjustments and settlements, and working with outside counsel to support and defend tax positions. Cory also resolves all IRS practice and procedure matters, including penalty abatement, voluntary disclosure, excise tax, employment tax, foreign and domestic information withholding and reporting, employee identification numbers, entity classification, R&D credit, transfer pricing, residency certifications, collection due process, and refund claims.

Prior to joining Andersen, Cory was at EY where he led the Tax Controversy practice for all clients in the financial services industry across North and South America. Before EY, Cory was a practicing tax attorney with the IRS Office of Chief Counsel where he litigated cases on behalf of the Commissioner of Internal Revenue in US Tax Court and advised IRS agents as they conducted audits and appeals.