Michael Plowgian, who in December left his role as deputy assistant secretary for international affairs at the Treasury Department, had an eventful stint at the department.

The former top OECD negotiator for the US started at Treasury in October 2021 as a counselor right around the time over 140 countries agreed to the global tax deal. Since then, Plowgian has been a part of large steps in the deal's progression—from tranches of Pillar Two rules to the release of a draft multilateral treaty text that would reallocate large multinational companies' residual profits to market jurisdictions.

The international tax pact consists of two parts: a reallocation of large multinational companies' residual profits, known as Pillar One, and a 15% global minimum tax, known as Pillar Two.

The work at the Organization for Economic Cooperation and Development, and therefore the Treasury, isn't done. Plowgian talked to Bloomberg Tax reporter Lauren Vella about what's next for the deal, how the multilateral treaty might fare in Congress, and what red lines the US won't cross in further negotiations with other countries.

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