Hallliburton Co. said Thursday that Jeff Miller has been promoted to executive vice president and chief operating officer.

Miller has held a number of positions at Halliburton, including most recently as senior vice president of global business development and marketing.

The Houston company provides a variety of services for the petroleum industry.

Halliburton shares fell 12 cents to $36.01 in after-hours trading. During the regular session, they declined 28 cents to $36.13.