Three of Pennsylvania’s largest law firms also appear to be some of the most highly thought of among the largest purchasers of legal services—Fortune 1000 corporate counsel.

Morgan, Lewis & Bockius, Reed Smith and K&L Gates earned spots on BTI Consulting Group’s Client Service 30, which marks the 30 best-performing law firms in the country when it comes to client service as viewed by the clients. The list, which tracks firms’ performance in 17 activities thought to drive client service, is generated after BTI conducts hundreds of interviews with corporate counsel.