Mersana Therapeutics, Inc. announced that the company has expanded its senior leadership team. Peter U. Park, Ph.D., has joined the company as Vice President of Biology, and Wayne Foster, CPA, has joined as Vice President of Finance. Prior to joining the company Dr. Park was a co-founder and Chief Executive Officer of Habgen, Inc. Prior to joining the company, Mr. Foster served for nine years as Senior Director of Finance at Tolerx, Inc. Mr. Foster also served as Senior Manager at Arthur Andersen LLP where he specialized in emerging life science and technology companies.