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

Partner
A.J. Monaco

A.J. Monaco

Partner

Practice Areas

We have extensive experience in representing private equity firms, hedge funds, 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 business entities. The firm also regularly represents firms and individuals in the technology sector.

Our matters have involved an extremely wide array of litigation, including investor disputes, contract disputes, partnership disputes, employment-related disputes, litigation arising in and related to bankruptcy proceedings, and regulatory defense matters.

Contact Us

O'Brien LLP

900 Third Avenue,
18th Floor New York, NY 10022
Click here for a list of directions.

  • Phone: (917) 207-7132
  • Fax: (646) 205-3071
  • Email Us