Dr. Thomas J. Lynch, Jr., has been appointed executive vice president and chief scientific officer, Bristol-Myers Squibb. He succeeds Dr. Francis Cuss, who will retire from the company. Dr. Cuss will serve as an advisor for the next three months during the transition. Dr. Lynch will step down from BMS’ board of directors.   Dr. Lynch has more than 30 years of medical, management and leadership experience, including more than 23 years at Massachusetts General Hospital (MGH). He served as chairm...