After 16 years litigating some of the most consequential cases in recent state history, trial lawyer Mary Catherine Roper left her position as deputy legal director of the ACLU of Pennsylvania to take an of counsel role at Philadelphia litigation boutique Langer Grogan & Diver.

The nine-lawyer firm has been a frequent co-counsel to Roper during her time with the commonwealth’s ACLU affiliate, litigating cases that went on to uphold immigrant rights and hold police accountable for alleged misconduct. Roper and leaders at the nonprofit and firm said they look forward to collaborating on impact litigation.