Chevron has hired former Citigroup oil and gas banker Martin Lovegrove in an advisory role as the energy group looks to expand production.

Bloomberg reports that Lovegrove was Citigroup’s chairman for global energy until departing the New York-based bank earlier this year.

He advised on transactions including Cnooc Ltd.’s $15.1bn acquisition of Canada’s Nexen Inc., the largest-ever foreign takeover by a Chinese company.

In the meantime, Reuters reports that Morgan Stanley’s four-person team of liquefied natural gas traders in London and Singapore are leaving the bank to join commodities giant Glencore Xstrata, industry sources said on Thursday.

Three of the traders are based in London and one is based in Singapore, three sources with knowledge of the move said.

Chevron Hires Ex-Citigroup Energy Banker Lovegrove as Adviser

Morgan Stanley LNG traders to leave for Glencore – sources