Answer
Exxon Neftegas is a joint venture between Exxon Mobil and Rosneft, Russia's state-owned oil company. Tillerson has been a director of Exxon Neftegas since 2012. The joint venture is developing oil and gas fields in Russia's Arctic region. Tillerson has been criticized for his role in the joint venture, as some believe that it gives him a conflict of interest in his role as Secretary of State.