Nersesian has been executive vice president and chief operating officer since November 2011.
Nersesian, 53, will continue to be responsible for Agilent's Chemical Analysis (CAG), Life Sciences (LSG), Electronic Measurement (EMG), and Agilent Order Fulfillment (AOF) businesses, with the presidents of those groups reporting to him. Nersesian will continue to report to William (Bill) Sullivan, who remains chief executive officer.
Nersesian first joined Hewlett-Packard Co., Agilent's predecessor company, in 1984. Since then he has served in various management positions, including president of the electronic measurement business from 2009 to 2011.
Nersesian holds a bachelor's degree in electrical engineering from Lehigh University and an MBA from New York University, Stern School of Business.
"Ron is an outstanding global business leader," said Sullivan. "He transformed EMG when he headed that business, resulting in record profitable growth across current and emerging markets."
"Over the past year as COO, Ron made significant strides in increasing the profitability of our life science and chemical analysis businesses even as we navigated through a difficult economy," said Sullivan.
Sullivan added, "Ron's appointment as president and COO is an opportunity for Agilent to further leverage the skills of an executive with an exceptional record of business growth, cost improvements and superior return on invested capital."