Zubair Ahmad


Zubair Ahmad is Counsel working with the Antitrust department in the Philadelphia office. He has extensive experience with e-discovery in large scale litigation and has also spent time as associate in-house counsel with a developer of ambulatory surgical centers as well as a large regional hospital.

Natisha L. Aviles

Senior Counsel

Natisha L. Aviles is Senior Counsel in the Firm’s Antitrust division, specializing in complex litigation related to pharmaceuticals, investment fraud, and general anti-competitive business practices.

Daniel Berger

Executive Shareholder

Daniel Berger graduated with honors from Princeton University and Columbia Law School, where he was a Harlan Fiske Stone academic scholar. He is a senior member and Executive Shareholder. Over the last two decades, he has been involved in complicated commercial litigation including class action securities, antitrust, consumer protection and bankruptcy cases.

Harold Berger

Executive Shareholder Emeritus & Of Counsel

Harold Berger is Of Counsel & Executive Shareholder Emeritus. Judge Berger participated in many complex litigation matters, including the Exxon Valdez Oil Spill Litigation, No. A89-095, in which he served on the case management committee and as Co-Chair of the national discovery team.

Robert Berry


Robert Berry is an Associate in the Philadelphia office and practices primarily in the Firm’s Antitrust group. Robert is a graduate of Cornell University, where he was admitted to the Phi Beta Kappa honor society, and of the University of Pennsylvania Carey Law School, from which he graduated Magna Cum Laude

Hope Brinn


Hope Brinn is an Associate in the Philadelphia office and practices in the Firm’s Antitrust group. Prior to starting at the Firm, Hope clerked for the Honorable Janet Bond Arterton in the United States District Court for the District of Connecticut. Hope is a graduate of Swarthmore College, where she was a Lang Opportunity Scholar […]

David M. Catherine


David Catherine is Counsel in the firm’s Philadelphia office. He has over 15 years of experience in litigation, with a focus on discovery and litigation preparation, primarily in the areas of Pharmaceutical Antitrust, Pharmaceutical Products Liability, Commercial Litigation, Shareholder Derivative Litigation and ERISA.

James P.A. Cavanaugh


James Cavanaugh is an experienced litigator having previously established and managed for some years his own general practice law firm, prior to working in antitrust matters in more recent years. That law practice emphasized litigation, including workers’ compensation, employment law, civil rights, and personal injury claims. In that practice, Mr. Cavanaugh advocated for the establishment […]

Carl Copenhaver


Carl Copenhaver is Counsel practicing in the Firm’s Antitrust practice group. Mr. Copenhaver has nearly 18 years of experience in complex commercial litigation specializing in discovery and evidentiary-related aspects of litigation preparation.

Caitlin G. Coslett

Shareholder and Co-Chair of the Antitrust Department

Caitlin G. Coslett is a Shareholder and Co-Chair of the Firm’s Antitrust Department. She concentrates her practice on complex litigation, including antitrust and mass tort litigation.

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