Cozen O’Connor is facing allegations that it failed to properly handle conflicts in a multimillion-dollar construction law arbitration after hiring a group of construction lawyers from Pepper Hamilton.

When it announced the hires in April, Cozen O’Connor said the new partners would help elevate the construction practice on a national and international scale. But a former client of those partners, Henry McNeil, alleges that the firm gained an unfair advantage for its client, E.B. Mahoney Brothers, through the lateral hires.