Exxon Mobil is reluctant to become more involved in oil development in Guyana pending the revelation of the new terms of the production sharing agreement (PSA). Liam Mallon, the company's president of oil and gas production, said Guyana is central to its plans to increase the company's global oil production by about 13 percent by 2027. The company's decision will depend on the terms of the new PSA, which are expected to be finalized on March 8.