Paul M. Mathias, PhD, is a chemical technologist with more than 42 years of experience who specializes in applied thermodynamics and process modeling (Email: paul.mathias@fluor.com). He is a Technology Director and Senior Fellow at Fluor Corp., and he manages his consulting practice in chemical process technology. He previously worked for Aspen Technology, Air Products and Chemicals, the ASPEN Project at the Massachusetts Institute of Technology (MIT), and as an associate editor of the Journal of Chemical & Engineering Data. He is Fluor’s representative to the Design Institute for Physical Properties (DIPPR), has served as DIPPR-801 Chair, and is a member of the DIPPR Managing Board. He has served on the Thermodynamics and Transport Properties committee of AIChE and is a member of the Joint ASME/AIChE Committee on Thermophysical Properties. He was elected as a Director of AIChE’s Fuels and Petrochemicals Div. (2016–2019). He has served on the advisory board of the chemical engineering departments at four universities: Univ. of Florida, Univ. of Illinois at Chicago, Texas A&M Univ., and Univ. of California, Irvine. He has six patents, over 90 publications, and has given over 130 technical presentations. Mathias was elected an AIChE Fellow in 2015. He has a BTech from Indian Institute of Technology (IIT), Madras, and MS and PhD from the Univ. of Florida, all in chemical engineering.