Ivan A. Sacks

Chairman | New York

Ivan is chairman of the firm and is a partner in the private client and tax team.

He is a private client lawyer and trusted advisor to international and domestic families of significant wealth. He became global chairman of Withersworldwide in July 2013 and is also a member of the firm’s Latin American and Asia-Pacific groups.

Both in the US and in an international context, he counsels families and entrepreneurs on the structuring of their closely held business interests, family offices, and charitable foundations, the design and administration of trusts and estates, and comprehensive risk management, governance and succession planning. He also frequently advises banks and trust companies on fiduciary matters.

Ivan is admitted to the bar of the State of New York and the Federal District Court for the Southern District of New York. He graduated from Columbia Law School, where he was a Harlan Fiske Stone Scholar, a Charles Evans Hughes Fellow and Editor-in-Chief of the Columbia Human Rights Law Review. He is an active member of several bar and professional bar associations and speaks frequently on topics related to wealth planning.

He also serves as a director or other fiduciary for a number of private and non-profit organizations.

Ivan is ranked among Legal Week’s Private Client Global Elite 2017, and is also listed as a New York Super Lawyer 2015 and on Citywealth Leaders List.

Secretary Rosa Marrero


Ivan is a person who I have the utmost confidence in and is one of the first people I turn to in order to assure my clients are given the best legal services available.

Citywealth Leaders List, 2016

He is an extremely able lawyer with a big clientele

Chambers HNW 2016, New York

He has had a lot of exposure to international estate planning,” one source comments, adding: “He represents a number of clients in Latin America, and is a good and solid guy with good judgement.

Chambers HNW 2016, New York





State of New York, 1993

Registered Foreign Lawyer in the UK, 2003

‘Tax Cuts for Small-Business Owners? It’s Complicated.’ The New York Times - November 2017, quoted

‘_Cuba: Fine to stormy,’ Offshore Investment - July/August 2017, co-author

Association of the Bar of the City of New York

Society of Trust and Estate Practitioners

Chambers USA American Leading Lawyer

New York State Bar Association

Speaker, ‘Scaling global - The law of the land’, HSBC and Slate Studios podcast - November 2017

Panelist, ‘The Future of Income and Inheritance Taxation for Wealth Structures in Latin America’, 22nd International Trust and Tax Planning Summit, Miami FL - November 2013

Panelist, ’360 View of Banking For Latin Clientele’, STEP Latin America Annual Conference, Montevideo, Uruguay - October 2013



  • English






New York

430 Park Avenue,

10th Floor,

NY 10022-3505

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