Merrimack Pharmaceuticals, Inc. announced that Birgit M. Schoeberl, Ph.D. has been named the new head of its Discovery division. Ulrik B. Nielsen, Ph.D. will be stepping down as the head of the Discovery division and has been elected to serve on the company's board of directors. Anthony J. Sinskey, Sc.D. will also be resigning from the board of directors and will continue as a scientific advisor.

All of these transitions will occur on January 30, 2015. Nielsen has been elected to serve on the company's board of directors, effective January 30, 2015. Prior to joining the company, Nielsen trained at University of California, San Francisco, and MIT.