Naj succeeds Jim Gardner, who will retire in April after 29 years of service.
In his new position, Naj will work closely with Pfizer's senior management in representing Pfizer's business to investors and analysts in the U.S. and overseas. He will report to David Shedlarz, Pfizer's vice chairman.
"Amal brings considerable operational and communication experience and joins us at a critical time for Pfizer as we take action on a number of fronts to leverage our competitive strengths and to build the investment value of our company," said Shedlarz. "We will continue to be active in communicating our performance, strategy and future opportunities to our shareholders and the investment community."
Naj joined Pfizer in 1996 and has served as country manager, Thailand and Indochina since 2000. During this time, he led a six-fold increase in Pfizer's business in the region.
Prior to joining Pfizer, Naj had a 17-year career as a journalist with
The Wall Street Journal
, where he covered a wide range of industries from Pittsburgh, Detroit and New York. Naj received an undergraduate degree in science from the University of Bombay and later pursued graduate studies in economics and philosophy at Queen's University in Northern Ireland.