Sean Mack

Member of the Firm
Phone Number: 


Sean Mack is the Co-Chair of the firm's Litigation Practice. He has substantial experience litigating complex business disputes in state and federal courts in New Jersey, New York and other jurisdictions. Many of Sean’s clients are in the medical device, healthcare and transportation industries. Sean has extensive experience representing companies and senior executives in lawsuits involving claims of breaches of fiduciary duties, theft of corporate opportunities, breaches of restrictive covenants and in partnership disputes and dissolution proceedings. In a recent lawsuit against a former senior executive of a healthcare company, Sean successfully obtained a preliminary injunction enforcing a restrictive covenant prohibiting the former executive from competing against his former employer anywhere in New Jersey.

Sean has represented plaintiffs and defendants in intellectual property disputes, including trademark and trade dress infringement cases, theft of trade secrets and unfair competition cases. Sean represents motor carriers in contract disputes and has provided advice on a variety of legal issues affecting motor carriers and the intermodal shipping industry. Sean also is an experienced appellate advocate having presented appeals in several federal appellate courts and New Jersey’s appellate division. International law firms have regularly retained Sean to serve as local counsel in complex disputes venued in New Jersey. 

Sean has been recognized as a New Jersey Rising Star for the editions of 2010-2013. In addition, he has been included in New Jersey Law Journal’s “40 Under 40” list, for 2009 and 2011 and he is ranked in the 2013-2016 editions of Best Lawyers for his Commercial Litigation practice.

Professional/Civic Activities

Member, American Health Lawyers Association
Member, New Jersey Bar Association
Member, Bergen County Bar Association
Former Member, District II-B Ethics Committee

Bar/Court Admissions

New Jersey, 2000

New York, 2000 

United States District Court, District of New Jersey, 2000

United States District Court, Southern District of New York, 2001

United States District Court, Eastern District of New York, 2002

United States District Court, Northern District of New York, 2011

United States Court of Appeals, Second Circuit, 2005

United States Court of Appeals, Fourth Circuit, 2003

United States Court of Appeals, Sixth Circuit, 2004


College of the Holy Cross
B.A., cum laude, 1995
Rutgers School of Law - Newark
J.D., with highest honors, Order of the Coif, 1999