Jirong Xiao will become the vice president of sales and marketing, and Barbara Smith will become the vice president of products and technology. The changes will become effective June 1, when Colin Parfitt, who is the current vice president of sales and marketing, becomes the president of supply and trading in Chevrons recently realigned gas and midstream organization.

Xiao has been the vice president of products and technology for Oronite since 2006. He joined Chevron Research and Technology Co. as a research engineer in 1990, and in 1997 became an area business manager in technology marketing. He held other positions of increasing responsibility within the downstream group, including assignments in Chevrons global marketing organization.

Smith has been the senior business manager for refinery strategy at Chevrons Richmond, Calif., refinery since 2010, after having spent time as technical manager at the same facility. Smith began her career with Chevron as a research engineer in catalyst and process development in 1989. In 2000, Smith became strategic planning manager for the downstream technology company and advisor to senior leadership.