KrisEnergy Ltd. has named Kelvin Tang, who currently serves as COO and president of the company’s Cambodian operations, as the new CEO. The change takes effect Sept. 1, according to a news release.

Tang will replace interim CEO Jeffrey S. MacDonald, who is resigning from the CEO and board executive director roles effective Aug. 31.

“Kelvin has been an instrumental member of senior management since KrisEnergy was established in 2009 and led our negotiations with the Cambodian government regarding the Block A petroleum agreement, which was signed on Aug. 23, 2017,” Tan Ek Kia, KrisEnergy’s nonexecutive chairman, said in the release. “The Block A agreement is significant for Cambodia and for KrisEnergy.”

Tang has been working in the upstream oil and gas industry since 2005 when he joined Pearl Energy Ltd. as general counsel and company secretary, the release said.