CAMBRIDGE, Mass., Sept. 27, 2007 (PRIME NEWSWIRE) -- Momenta Pharmaceuticals, Inc. (Nasdaq:MNTA), a biotechnology company specializing in the characterization and engineering of complex drugs, announced promotions and new roles for two key executives. Steven Brugger has assumed the newly-created position of Chief Operating Officer and Ganesh Venkataraman, Ph.D. has become the Company's first Chief Scientific Officer.