Frazier to replace Clark as chair of Merck
Merck has announced that Richard T. Clark, chairman, will retire from the company and the Merck board of directors effective Dec. 1.

Clark led the company for five years as president and CEO from 2005 through 2010. He served as a Merck director since May 2005 and chairman of its board of directors since 2007.

In January, Kenneth C. Frazier became Merck's president and CEO and a member of its board. The board has elected Frazier to serve as chairman following Clark’s retirement.

Clark joined Merck in 1972 as a quality control inspector and became vice president (VP) of materials management and management engineering in 1991. In 1993, Clark was appointed VP of procurement and materials management. He became VP of North American operations for Merck's manufacturing division in 1994 and senior VP in 1996. In 1997, he was appointed senior VP of quality and commercial affairs.

After leaving to join the Merck-Medco Managed Care subsidiary as executive VP and chief operating officer, and later chairman, president and CEO of Medco Health Solutions, Clark returned to the Merck manufacturing division as president in June 2003.

Clark was named CEO in 2005 and was later elected chairman of Merck's board of directors in 2007. In 2009, he led the $49 billion merger between Merck and Schering-Plough.