Anadarko Petroleum Corp.’s (NYSE: APC) board of directors has named Daniel E. Brown executive vice president of international and deepwater operations and Bradley J. Holly executive vice president of U.S. onshore exploration and production, the company said in a news release.

Darrell E. Hollek, formerly executive vice president of operations, will serve as a senior adviser until his retirement later this year.

Brown, who began his career with Anadarko in 1998, most recently served as senior vice president of international and deepwater operations—a position he’s held since August 2016. He also has served as Anadarko’s vice president of operations for the southern and Appalachia region, vice president or corporate planning, general manager of the Maverick Basin and the U.S. Freestone/Chalk area, business advisor for planning and reserves administration in the Gulf of Mexico (GoM) and in engineering roles in the U.S. onshore and the GoM, the release said.

Holly, who most recently served as Anadarko’s senior vice president of U.S. onshore E&P, began his career in 1994 with Amoco and joined Anadarko in 1997, according to the release. His more than 20 years of experience have included roles at Anadarko as senior vice president of operations for the Rocky Mountain region, vice president of operations for the Southern and Appalachia region and general manager of the Greater Natural Buttes area in eastern Utah and the Maverick Basin. Prior to that, he served as reserves and planning manager for the Southern and Appalachia region and was a reservoir engineer and development supervisor on Anadarko's Marco Polo and K2 developments in the deepwater GoM, the release said.