Official NY OCA attorney registration data · Updated 2026 Methodology Discipline records
Law firm

DeMarco Law, PLLC

7 attorneys in the New York State Bar registry list this organization as their firm or employer.

About DeMarco Law, PLLC

DeMarco Law, PLLC is a New York litigation and counseling firm. Its website describes the firm as focused on intellectual property, online commerce and Internet law, and information privacy and security. According to the firm, it was founded by a former federal prosecutor, and its lawyers have worked on intellectual property, emerging technology and computer crime matters. The firm also presents itself as an adviser to businesses on regulatory compliance as well as a litigator in disputes.

The firm's listed practice areas include litigation and enforcement, covering trade-secret theft, data breach, copyright and trademark disputes and identity theft, along with internal investigations and responses to government inquiries. Its privacy work covers data protection assessments, audits and incident response. The website also mentions expert analysis and testimony in disputes involving iGaming, eDiscovery and cybercrime, states that the firm performs pro bono work, and lists its office at 99 Park Avenue in New York, NY.

TypeLaw firm
New York officesNew York, NY
Phone(212) 922-9499
Websitedemarcolaw.com
Registered NY attorneys7

Practice areas

Areas of work that DeMarco Law, PLLC describes on its own website. They describe the organization as a whole, not the practice of any individual attorney listed below.

Intellectual Property Privacy & Cybersecurity Commercial Litigation White Collar & Investigations

Organization profile based on its official website and public sources (reviewed October 30, 2026). Attorney list from the New York State Unified Court System registration data. Not affiliated with DeMarco Law, PLLC.

Registered attorneys

Mark Feldman Admitted 1976 · New York, NY Currently registered Eric Seidel Admitted 1979 · New York, NY Currently registered Sylvia Khatcherian Admitted 1980 · New York, NY Currently registered Joseph Demarco Admitted 1993 · New York, NY Currently registered David Hirschberg Admitted 2009 · New York, NY Currently registered Karyn Kenny Admitted 1996 · New York, NY Currently registered Brian Fox Admitted 2013 · New York, NY Currently registered

Registration status can change at any time. Confirm any attorney's current status through the official New York Attorney Search.

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