Mohamed A. El-Sharkawi received his PhD in electrical engineering from the University of British Columbia in 1980 and joined the University of Washington as a faculty member the same year. He authored more than 250 technical papers and research monographs during his career, including four textbooks in electric energy, electric drives, electric safety, and wind energy, and held multiple licensed patents in the areas of wind energy, dynamic VAR management, and minimum arc sequential circuit breaker.Professor El-Sharkawi founded and chaired the IEEE Power and Energy Society’s subcommittee on renewable energy machines and systems. He is the founder and cofounder of several international conferences and the founding chairman of numerous IEEE task forces, working groups, and subcommittees. He received several educational, service, and research awards, among them are the Outstanding Educator Award for IEEE Western Region in 2014 and the International Fellow Award 2015–2017. Dr. El-Sharkawi was a Fellow of IEEE, a professor of Electrical Engineering, and held a professorship in the Clean Energy Institute.Dr. El-Sharkawi was emeritus professor at the time he passed away on October 24, 2018.Mark J. Kaiser is a Research Professor at the Center for Energy Studies at Louisiana State University, Baton Rouge, where he has worked since 2001. His research interests cover all aspects of the energy industry, notably the oil, gas, electricity, and refining sectors, offshore development, cost estimation, economic valuation, and infrastructure modeling. He has authored over 300 academic publications along with numerous reports and trade articles, has secured grants of several million dollars over his career, and currently serves on the editorial boards of several energy journals. He was named Marathon Professor in 2017.In the first decade of his career, he worked in electric power applications (energy efficiency verification, load forecasting, tariff design), electrohydrodynamics (applications, simulation and theory), transformer design, power cables, and small-scale renewable energy projects (solar PV, solar thermal, wind). He also spent more time than he should have on convex geometry, geometric optimization, and computational metrology research.He is the author of five research monographs on the offshore oil and gas, wind, drilling, decommissioning and service industries published by several reputed journals, the 6th edition of Petroleum Refining: Technology, Economics and Markets with A. de Klerk (CRC Press, 2020), and the 9th edition of Pipeline Rules of Thumb Handbook with E.W. McAlister. He occasionally consults and serves as a technical expert for government agencies and companies. He earned his doctoral degree from Purdue University in 1991.