Dean C. Rietz, P.E., Director at RSK [UK] Limited, Petroleum Engineer since 1984, specializes in evaluating oil and gas properties, including applying numerical modeling approaches to these evaluations. Prior to joining RSK, Rietz was the Chairman and CEO at Ryder Scott Company. Rietz began his career as a production engineer at Chevron and worked at Gruy and Intera. He received a B.S.P.E. degree from the University of Oklahoma, an M.S.P.E. degree from the University of Houston, and an M.H.M degree from the Hilton College at the University of Houston. Rietz has published various papers and has also presented at various industry forums such as SPE, AAPG, SPEE, SPRE on topics such as reserves and reservoir modeling and numerical modeling in general. He was a Society of Petroleum Engineers (SPE) Distinguished Lecturer in 2016–2017. In 2018 Rietz was named the University of Houston, Cullen College of Engineering Distinguished Alumnus. Since 2001, Rietz has been an adjunct professor and a member (and past chair) of the Petroleum Engineering Industry Advisory Board, both at the University of Houston. Rietz is an active member of the SPE and the Society of Petroleum Evaluation Engineers (SPEE) and is a registered professional engineer in Texas.