Chevron Corp. named Joseph C. Geagea as corporate vice-president and president, Chevron Gas & Midstream, effective Jan. 1, 2012.

Pierre Breber will succeed Geagea as managing director of the company’s Asia South region. Most recently, Breber served as deputy managing director of that business unit, where he reported to Geagea.

Geagea succeeds John D. Gass who will retire from Chevron after more than 37 years with the company. Geagea is currently the managing director responsible for Chevron’s exploration and production activities in the Asia South region, including Thailand, Bangladesh, Myanmar, Cambodia, Vietnam, and China.

In his new role, Geagea will be responsible for commercializing Chevron’s gas resources and supporting the development of new growth opportunities worldwide. He will also oversee Chevron’s shipping, pipeline, power and natural gas trading operations.