William Kambas > Withers Bergman LLP > New York, United States > Lawyer Profile
Withers Bergman LLP Offices
430 PARK AVENUE
10TH FLOOR
NEW YORK, NY 10022-3505
NEW YORK
United States
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William Kambas
Work Department
Personal Tax
Position
Partner
Career
William focuses on tax planning for multi-national and multi-state personal, active business, and investment activities, with a particular emphasis on tax structuring and choice of business entity for US and non-US business owners and investors.
Bill has represented a wide variety of private and public businesses, including family-owned, start-ups and multi-million dollar enterprises on purely domestic as well as inbound and outbound business transactions, cross-border investments (whether made directly or through investment funds or joint ventures), and qualification for US tax treaty benefits. In particular, he has considerable experience advising non-US persons on the US income and estate tax consequences and tax planning associated with the ownership of US real estate (whether residential or commercial, development, operational, or for personal use).
An integral part of Bill’s work involves assisting families and/or their family offices with the formation, management, and/or periodic evaluation of multinational and/or multi-generational centralized control and management structures, such as family offices and private trust companies.
In addition to numerous speaking engagements, organization memberships and publications, Bill has been featured as a guest lecturer at the Heckerling Institute, the Hellenic Studies Program at Yale University, the Columbia Business School at Columbia University, the University of Connecticut School of Law and the Charles F. Dolan School of Business at Fairfield University. He also was specifically recognized as a “key lawyer” as part of the Withers US International Tax Team ranked by the US Legal 500 2020.
Memberships
Society of Trust and Estate Practitioners “STEP” (New York), Chair of Communications
International Fiscal Association (Westchester, NY and Connecticut Region), Executive Committee
Skidmore College Annual Fund, President
Saint Barbara Greek Orthodox Church Endowment Fund, Chairman
Hellenic Bar Association of Connecticut
New York State Bar Association
Connecticut Bar Association
American Bar Association
Education
Skidmore College, B.A.
University of Connecticut School of Business, M.B.A.
University of Connecticut School of Law, J.D. (Certificate in Tax)
Lawyer Rankings
United States > Tax > International tax
Withers Bergman LLP utilizes a global platform and expertise in privately held capital to support multi-generational, high net worth, and ultrahigh net worth families with their cross-border taxation matters. The team is co-led by William Kambas, who splits his time between the New Haven, Greenwich, and New York offices, California and Texas-based Michael Brophy, and Jason Dinwoodie, who sits in the New Haven office. Kambas concentrates his practice on international tax planning for multi-national and multi-state personal, active business and investment activities with a particular emphasis on tax structuring and choice of business entity for US and non-US business owners and investors. Michelle Graham, who is based in San Diego, currently counsels several of Mexico’s wealthiest families in tax structuring and compliance as well as advising on sophisticated planning issues for family businesses, including structuring and implementing intra-family sales, buy-sell agreements and family business succession planning. David Stein, who sits in the New Haven, New York, and San Francisco offices, routinely advises US and non-US single-family offices, fund managers, and young entrepreneurs on cross-border restate planning and income tax advice. Also in San Francisco, Marsha Dungog supports with cross-border tax planning and tax compliance for HNW individuals, families, founders, executives and entrepreneurs. Los Angeles-based Paul Sczudlo concentrates his practice on global planning matters, including cross-border and entertainment tax planning. Alistair Christopher, who is located in New Haven, specializes in international and domestic tax and estate planning.