Before joining Merck, Dr. Colin had been a research associate at the Rockefeller Institute and had headed laboratories at the Tidewater Oil Company.

He joined Merck in 1976 after working for the World Health Organization.

She conducted her postdoctoral study at Cornell and worked in Geneva for the drug maker Glaxo before joining Merck.

After joining Merck, he immediately applied his faith in the notion that important therapies could be based on drugs that would manipulate human enzymes.

Frazier joined Merck in 1992, and became general counsel of the company in 2006.

He then joined Merck, and retired in 2003.

Before joining Merck & Company, he was in private law practice in Manhattan.

Ms. Lewent worked for a competitor, Pfizer Inc., for four years before joining Merck.

Her managers responded that there was a risk that the company could lose sales, the employee said, but that they believed other pharmaceutical companies would soon join Merck.