With more than 15 years of experience, William is an accomplished international tax professional with a proven track record of results blending business, legal, public policy, and taxation expertise in advising multi-national business organizations.

William provides invaluable counsel for clients operating in an environment of intense scrutiny and challenges brought about by the changing tax laws and ever-increasing regulatory environment. He has extensive expertise in the area of international taxation with specific expertise in corporate reorganizations, global restructuring, as well as U.S. inbound/outbound tax issues. He advises companies on emerging issues regarding 2017 Tax Reform legislation (i.e., Sec. 965, GILTI, FDII and BEAT) and provide insights on its impact on existing business models. He also advises companies on tax legislations and developments around the world including the impact of EU Directives, OECD guidelines, MLI and unilateral actions (i.e., DST).

William joined Frost Law in 2021 as Of Counsel with combined Big Four and corporate experience. Previously, he served as the International Tax Senior Advisor with the Global Tax Operations group at IBM Corporation in New York. His previous experience also included positions at Deloitte Tax LLP, Ernst & Young LLP.

Michael J. Kearney, Jr. represents clients in connection with a wide range of tax matters. He is an experienced tax lawyer with a broad-based transactional tax practice involving corporations, partnerships, and LLCs. His experience includes advising clients on domestic and cross-border mergers and acquisitions, buyouts, and joint ventures, private equity fund structuring, formation, and investment, real estate taxation, and restructurings and workouts.

Mike advises clients on federal and international tax matters. He works closely with clients including multinational corporations and private equity funds on domestic and cross-border mergers and acquisitions, joint ventures, U.S. tax withholding and reporting obligations, expatriations, and tax treaties. His experience also includes managing tax structuring and due diligence teams. He is a member of the International Fiscal Association, USA Branch (Westchester County, NY/Connecticut Region).

Mike has represented middle market private equity fund sponsors and investors (U.S. taxable, tax-exempt and non-U.S. taxpayers) on tax matters associated with fund structure (domestic and offshore), formation, operations, co-investments, and secondary transactions. He also represents non-U.S. resident investors on strategic tax planning and structuring related to U.S. investments.