Two medical malpractice attorneys from Obermayer Rebmann Maxwell & Hippel, including the co-chair of that practice, have joined Burns White, further adding to the latter firm’s growing litigation bench.

Burns White has added Ruth R. Wessel as a member and Kirsten B. Hare as an associate in its Philadelphia-area office, located in West Conshohocken, the firm announced Tuesday. The firm has hired about 20 lawyers this year, executive committee member David B. White said.