I partner with businesses, governments and other stakeholders to build a better working world by offering my vast experience addressing the complexities of international tax in an increasingly connected world.

Dr. Zach Pouga Tinhaga

Principal, International Tax and Transaction Services, Ernst & Young LLP

”40 under 40” by the American Bar Association and the National Bar Association; leader in helping clients meet international tax challenges globally; founder of Excellence Plus Foundation, a 501(c)(3)

As an International Tax principal, Zach regularly advises multinational companies on the tax aspects of inbound and outbound US cross-border transactions. 

He has deep experience in complex repatriation planning transactions, M&A and post-acquisition planning, global reorganization transactions, foreign tax credit planning, tax treaty analyses, intellectual property planning, tax compliance and controversy, partnership tax, and tax provisions.

Prior to Ernst & Young LLP, Zach worked in an international tax group of an international law firm in New York City. 

Zach has a doctorate in International Tax Policy from the University of Michigan, an International Tax LLM from Michigan Law School, an LLM in Corporate and Finance Law from Wayne State University, and an LLB and Master of Laws from the University of Douala.

How Zach is building a better working world 

His primary focus is to support companies that operate cross-border and help them navigate international tax challenges that arise. While he focuses on US international tax aspects of cross-border transactions, he regularly works with his colleagues around the globe and throughout time zones to provide our clients with full service, regardless of where they operate.

He works with US multinational companies as they operate in jurisdictions outside of the US and assists foreign multinationals with operations in the US.

He takes special interest in collaborating with small and medium companies as they scale to become global powerhouses.

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