Ari’s practice focuses on the tax aspects of cross-border transactions, business operations, and investments. His clients include foreign pension plans, foreign government pension funds, public and privately held corporations, private equity funds and financial institutions.

Ari's international experience includes advising foreign pension plans and foreign government pension funds regarding tax efficient structuring of investments in private equity funds, hedge funds, real estate investment funds and other joint venture investment structures. He also assists private equity clients with the U.S. tax aspects of fund formation and works with various clients to structure deferred compensation plans for employees and directors in compliance with U.S. tax rules.

Ari has recently been involved in representing CPP Investments, Ontario Teachers' Pension Plan Board, Borealis Infrastructure and Brookfield Asset Management.