DeGolyer and MacNaughton is one of the most respected names in the upstream segment of the oil and gas industry, providing reserves consulting services, resources evaluations, field studies, reservoir simulation studies, and many other services for energy and financial services companies worldwide. The firm employs more than 150 professional petroleum engineers, geologists, petrophysicists, statisticians and energy economists. D&M works with hundreds of clients worldwide each year, and staff members are organized by geography in order to maximize regional knowledge and provide more cost-effective, efficient consulting services.

Since its formation in 1936, the firm has completed thousands of assignments worldwide, driven by the desire to be the leader in petroleum industry consulting services. The firm offers extensive knowledge, an unquestioned devotion to integrity and a commitment to serving clients and ensuring their success as they pursue a wide range of petroleum development prospects.