Glen Benge is an independent consultant specializing in wellbore isolation and oil well cementing. In 2011, Glen retired from ExxonMobil where he spent over 24 years working as a technical adviser in drilling. While at ExxonMobil he oversaw the cementing and wellbore isolation technologies for their global drilling operations. He has 39 years of experience associated with all aspects of oil field cementing and has authored numerous papers and texts on all aspects of cementing design and application. He is past Chairman of API Subcommittee 10 on Oil Well Cementing, and has been an active member of API SC10 for over 37 years.