Dean R. Nicyper


Dean is a partner in the litigation and arbitration team and has been the Regional Division Leader for the US Dispute Resolution Division since 2015.

His team has focused on commercial disputes, contract disputes, art law, intellectual property, fiduciary liability, product liability, private company investor disputes, and securities litigation and investigations. Dean also has litigated matters involving mergers and acquisitions, the First Amendment, media, constitutional law, and environmental contamination. He has handled trials and cases in federal and state courts around the United States. In addition, Dean has negotiated and drafted many agreements in art and intellectual property transactions.

Among his various clients, Dean has successfully represented one of the two largest art auction houses in dozens of lawsuits covering a broad range of art law-related issues, such as the authenticity of works of art, art fraud, auction law, consignment obligations as well as rights and obligations of parties in loan transactions where works of art have been pledged as collateral. He also has represented artists and their families and foundations, art dealers and agents, art collectors, and art appraisers in many art-related disputes. He was lead counsel in the initial cases uncovering the two largest art fraud scandals in the past 20 years, and counsel for victims of two of the other largest art fraud scandals. In addition, Dean provided the leadership as chair of a bar association committee that resulted in the drafting and enactment of New York legislation detailing the rights and obligations of dealers and artists in art consignment relationships. He held the position as Chair of the Art Law Committee of the New York City Bar Association from June 2013 to June 2016.

Dean also has extensive experience in product liability litigation around the country. Court TV relied on his product liability expertise, having him appear several times as a commentator for featured product liability cases.

He also represented large investment institutions in connection with investigations by the Securities and Exchange Commission, as well as in private civil actions. He additionally has extensive experience defending clients against securities law claims.

Dean’s environmental litigation experience has primarily involved groundwater contamination, soil contamination and hazardous waste issues. He has handled large Superfund cases as well as responses to state and federal environmental investigations around the country.


Dean is a natural problem solver and creative thinker; anyone who has worked with Dean would know that he has a genuine passion for untangling thorny legal issues and achieving the best results for his clients.

Chambers HNW Guide 2021

He leads by example – he is not the type of law partner who attracts clients then sits back and gives assignments but, rather, is hands-on and immerses himself in his team’s collaboration.

Chambers HNW Guide 2021





State of New York, 1986

Withers global art team recognized by Chambers 2021 HNW guide,’ Withers Insight - July 23, 2021, co-author

Marlboro College

Art Law Committee of the Association of the Bar of the City of New York

American Horse Trials Foundation, Inc

American Bar Association

Copyright Society of the United States

‘Lessons Not Learned, Fraudsters in the Art Market,’ Center for Art Law - March 10, 2020, speaker

‘Uncovering Looted Antiques,’ New York City Association of the Bar - October 24, 2019

‘Art Law Mixer @ VLA- Getting Real: Authenticity and the Law,’ Volunteer Lawyers for the Arts, New York, NY - June 11, 2019



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