Complex Commercial Litigation

O’Brien LLP provides representation of the highest quality in complex commercial litigation, regulatory defense matters, employment and trade secret disputes, and white-collar criminal defense matters.   Our attorneys have successfully represented large and small businesses, including hedge funds, private equity firms, commercial banks and investment banks, broker-dealers and technology firms, as well the principals and employees of such firms, in a wide range of litigation and investigations throughout the country.   As counsel to plaintiffs and defendants, we have had great success in both trial and appellate courts.   The firm combines sophistication and wide experience with the tenacity and trial skills of a boutique firm.

Attorneys

Sean R. O'Brien

Sean R. O'Brien

Managing Partner
Sara A. Welch

Sara A. Welch

Counsel
A.J. Monaco

A.J. Monaco

Counsel
James C. Ng

James C. Ng

Associate

Practice Areas

We have extensive experience in representing hedge funds and private equity firms, investment banks, commercial banks, as well as their principals, portfolio companies and employees, along with other members of the financial services industry. That experience permits the firm to immediately identify and assess the array of concerns and competing obligations that arise in disputes involving investment funds and similar entities. Our matters have involved an extremely wide array of fund litigation, including investor and counter party disputes, partnership disputes, employment-related disputes, and regulatory defense matters.

Contact Us

O'Brien LLP

750 Lexington Avenue,
25th Fl. New York, NY 10022
Click here for a list of directions.

  • Phone: (212) 729-9243
  • Fax: (646) 205-3071
  • Email Us