David Simpson is currently the Principal Engineer and Owner of MuleShoe Engineering. His role involves providing engineering consulting services for the oil and gas industry focused on artificial lift, coalbed methane, and facility design. He has authored numerous journal articles, earned three patents, and is active in SPE, ASME, NACE, and NSPE. He is also an independent instructor teaching unconventional upstream operations and unconventional upstream operations engineering for practicing oil and gas engineers. David earned a BSc in industrial management from the University of Arkansas, a MSc in mechanical engineering from the University of Colorado, and is a registered professional engineer in Colorado and New Mexico.