Samuel Bridges is currently a Technical Service and Product Line Manager with an equipment company in Houston, providing technical expertise on drilling solids equipment for contractors and operators worldwide. Previously, he was active in the United States Navy assisting in program management in Afghanistan, Assistant Officer in charge of construction post-Katrina in Mississippi, a Facilities Operations Officer based in Iraq, and a Public Works Officer in the Navy based in Washington, DC. Sam is a Registered Professional Engineer in the state of Texas and is a member of Society of Petroleum Engineers, and Society of American Military Engineers. Samuel earned a BS in Mechanical Engineering from New Mexico State University. Leon Robinson is retired after a nearly 40-year career with a major operator and a 25-year career as a drilling instructor. Previously, he taught physics at Clemson, University of Chattanooga and North Carolina State College. He was a research engineer and research advisor with a major operator, traveling to 35 countries working on drilling operations. Leon graduated with a Bachelor of Science in Industrial Physics from Clemson, a Master of Science in Physics from Clemson, and a PhD. in Engineering Physics from North Carolina State College. He has published and authored multiple articles, papers, and chapters, including one book, and earned over 55 patents. He is a member of many organizations such as Society of Petroleum Engineers and Pi Epsilon Tau and was awarded induction into the AADE Hall of Fame and the SPE Drilling Legend award.