As home to supermajors, as well as a plethora of smaller, independent energy players, the US boasts one of the largest concentrations of energy personnel in the world. With its insatiable appetite for energy resources, the United States is the world's single largest consumer of oil, using as much as 20.73 million barrels per day as of 2008. Recently, interest has peaked in the vast quantity of untapped natural gas resources in the US, the reserves of which were inventoried in 2008 at 238 Tcf, with producers specifically targeting the nation's promising shale formations for this energy commodity.
The WellSite Supervisor is similar to the Company Man role. They act as the operator's representative at the drill site. The WellSite Supervisor has to ensure that the well is drilled in accordance with the approved drilling specifications, and that it’s completed in line with time and budget. They are also responsible for third-party personnel and contractors.