Petroleum companies have formed an important part of the global economy ever since petroleum, or crude oil, has become the world's main fuel source.  Warner has provided Consulting Services for significant gas and oil projects around the globe including, Liquified Natural Gas. Warner has worked on; the Tiga Plant in Bintulu, Malaysia; the Khartoum - Port Sudan Pipeline; Trenching Subcontract for the Sudan Shedgum Retro Refinery in Saudi Arabia; the Keystone Pipeline in the USA; and the Tamoil Refinery in Switzerland.