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.
Estimating falls under the broader heading of Cost Engineering but comes at the bidding stage of projects to provide an evaluation of the possible cost of a future contract. An Estimator or Estimating Engineer will review the cost of all elements of the project in order to establish the requirements for resources, funding, budget control and revenue generated.