Justin Zaremby is a Partner in the firm's Tax-Exempt Organizations department where he represents a wide range of public charities and private foundations. His clients include universities, museums and other cultural institutions; artist endowed and family foundations; donor-advised funds; human rights organizations; business leagues; social clubs and other tax-exempt entities. Mr. Zaremby acts as counsel to his clients on all aspects of their operations and management, providing strategic support at each critical stage of operation—from formation to expansion, from strategic planning to restructuring, and from ongoing compliance to crisis management. Mr. Zaremby has significant experience advising tax-exempt organizations in connection with corporate governance, transformational charitable giving, commercially driven mission activities, unrelated business income tax issues, compensation, modification of endowed funds through cy pres proceedings, investment management, and other state and federal regulatory matters. He helps organizations respond to regulatory oversight from the New York State Attorney General and has extensive experience counseling boards in crisis.

His practice includes a special focus on the intersection of corporate transactions and tax-exempt organizations, helping clients with program and mission-related investments; structuring joint ventures with for-profit companies; and advising on mergers, financing, and restructuring. In addition, he has broad experience helping organizations to develop international subsidiaries and international grantmaking programs.

Mr. Zaremby regularly speaks about non-profit organizations on a variety of topics. Recent presentations have focused on board leadership, private foundation grantmaking, collaborative funding structures, the intersection of art law and charities law, social media risk and global structuring. In 2020, he was named a Pathfinder by the Leadership Council on Legal Diversity. He currently serves as a trustee and Vice-Chair of the Wenner-Gren Foundation for Anthropological Research, as a trustee of the William C. Bullitt Foundation, and as a member of the Committee on Nonprofit Organizations at the Association of the Bar of the City of New York.

From 2010 to 2011, Mr. Zaremby served as a Law Clerk to the Hon. José A. Cabranes of the United States Court of Appeals for the Second Circuit. Prior to joining Patterson Belknap, Mr. Zaremby advised for-profit companies on complex commercial transactions and corporate governance matters at a New York-based law firm.