Onex
Sean Westerhof is a seasoned tax professional with extensive experience in senior roles across various prestigious firms. Currently serving as VP Tax at Onex since January 2017, Westerhof previously held the position of Partner - Tax at Grant Thornton LLP from 2009 to December 2016. Prior experience includes a role as Senior Manager at Ernst & Young Canada from 1998 to 2009 and Staff Accountant at Arthur Andersen from 1994 to 1998. Westerhof holds a Bachelor of Commerce degree from Queen's University, obtained between 1990 and 1994.
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Onex
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Founded in 1984, Onex manages and invests capital on behalf of its shareholders, institutional investors and high net worth clients from around the world. Onex’ platforms include: Onex Partners, private equity funds focused on mid- to large-cap opportunities in North America and Europe; ONCAP, private equity funds focused on middle market and smaller opportunities in North America; Onex Credit, which manages primarily non-investment grade debt through tradeable, private and opportunistic credit strategies as well as actively managed public equity and public credit funds; and Gluskin Sheff’s wealth management services. In total, as of September 30, 2022, Onex has approximately $51 billion of assets under management, of which approximately $7.9 billion is its own investing capital. With offices in Toronto, New York, New Jersey, Boston and London, Onex and its experienced management teams are collectively the largest investors across Onex’ platforms.