Advanced Micro Devices Inc. said senior vice president and chief of technology Phil Hester is resigning today.

Hester, 52, who has been with the company since 2005, was leaving to pursue other opportunities, spokesman Drew Prairie said.

Hester was responsible for setting technical direction and vision, including development of the company's accelerated computing strategy.

He won't be replaced since there are already various chief technology officers each working within AMD's business units, Prairie said. They will continue to pursue their programs.

Before his AMD tenure, Hester had spent 23 years at International Business Machines Corp.

Other recent executive departures at the company include chief of sales Henri Richard in September and graphic unit chief Dave Orton in July.

Shares of AMD fell 24 cents or 3.99 percent to $6.02 at 2:04 p.m. ET.