Before joining the firm, Stack served as the deputy assistant secretary for international tax affairs at the US Department of Treasury. In this role, he worked closely with the assistant secretary of tax policy and the international tax counsel to incorporate (aspects of) international tax policy within domestic law. Furthermore, he sat as the official representative of the Obama administration for international tax policy and represented the US government at the OECD, where he was heavily involved in all aspects of the BEPS initiative.
Stack’s wealth of international tax experience along with his tax technical talent is set to significantly strengthen Deloitte’s tax practice. Stack will advise US clients and collaborate with the firm’s global network on international tax developments, including those sanctioned by the OECD.
Stack has been named in the Global Tax 50 on three separate occasions, including in its most recent iteration in 2016.
