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.