Company > Leadership > Executive team

Executive team

Our executive team manages the day-to-day operations of our company. Our leaders come from all areas of the business to help position us to succeed.

Photo of Robert M. Davis

Robert M. Davis

Chairman and chief executive officer

Photo of Sanat Chattopadhyay

Sanat Chattopadhyay

Executive vice president and president, Merck Manufacturing Division

Photo of Richard R. DeLuca, Jr.

Richard R. DeLuca, Jr.

Executive vice president and president, Merck Animal Health

Photo of Cristal N. Downing

Cristal N. Downing

Executive vice president and chief communications & public affairs officer

Photo of Chirfi Guindo

Chirfi Guindo

Chief marketing officer, Human Health

Photo of Michael A. Klobuchar

Michael A. Klobuchar

Executive vice president and chief strategy officer

Photo of Dean Y. Li, M.D., Ph.D.

Dean Y. Li, M.D., Ph.D.

Executive vice president and president, Merck Research Laboratories

Photo of Caroline Litchfield

Caroline Litchfield

Executive vice president and chief financial officer

Photo of Steven C. Mizell

Steven C. Mizell

Executive vice president and chief human resources officer

Photo of Jannie Oosthuizen

Jannie Oosthuizen

President, Merck Human Health U.S.

Photo of Joseph Romanelli

Joseph Romanelli

President, Human Health International

Photo of Dave Williams

Dave Williams

Executive vice president, chief information & digital officer

Photo of Jennifer Zachary

Jennifer Zachary

Executive vice president and general counsel