Mark E. Schlesinger is a graduate of the University of Missouri–Rolla and the University of Arizona. He has spent a combined 31 years of teaching at The University of Utah and the Missouri University of Science and Technology. He is an author of: • Mass and Energy Balances in Materials Engineering • Extractive Metallurgy of Copper (4th and 5th English–language editions; Chinese edition) • Aluminum Recycling (two English language editions)Professor Schlesinger is a member of the (U.S.) Metals, Minerals, and Materials Society; the American Institute for Steel Technology; and the Society of Mining, Metallurgy and Exploration. He is a former Fulbright Scholar (Royal Institute of Technology (Sweden), 2002), and Leif Eriksson Fellow (Norwegian University of Science and Technology, 2012–13). He was named a Fellow of ASM International (2018).