BOSTON--(BUSINESS WIRE)--Third Rock Ventures, LLC today announced that Michael W. Bonney is joining the firm as a partner effective today. Most recently, Mr. Bonney served as chief executive officer of Cubist Pharmaceuticals Inc. (a subsidiary of Merck & Co., Inc. as of January 2015) from June 2003 until December 2014. His prior experience includes leadership positions in successful biotechnology and pharmaceutical companies such as Biogen and Zeneca Pharmaceuticals (now AstraZeneca). He also holds several board positions in leading biotechnology companies.