DeGolyer and MacNaughton

DeGolyer and MacNaughton is a petroleum consulting company based in Dallas, Texas, with offices in Houston, Moscow, Astana, Buenos Aires, and Algiers.

DeGolyer and MacNaughton was founded in 1936 by Everette Lee DeGolyer and Lewis MacNaughton. DeGolyer had formerly known McNaughton through their work with the petroleum exploration company Amerada. While serving as President, DeGolyer hired McNaughton to work for Amerada in 1928. Provided by Wikipedia