Ryder Scott

Ryder Scott Company is a petroleum consulting firm based in Houston, Texas, the United States. The firm independently estimates oil and gas reserves, future production profiles and cashflow economics, including discounted net present values. It assess oil reserves and evaluates oil and gas properties. 
History.
The company was founded in Bradford, Pennsylvania on July 1, 1937, by Harry M. Ryder, a prominent petroleum engineer, who died in 1954. and David Scott, Jr.
In 1967, Ryder Scott acquired Robert W. Harrison & Co., moved to Houston and transitioned from waterflood design to evaluation engineering, which is the core business of Ryder Scott.