Gregory D. MacLeod, P.E., is an engineering sales manager for CR Clean Air (Address: 6 Campus Dr., Parsippany, NJ 07054; Phone: 973-947-8787 x121; Email: gmacleod@crcleanair.com), where he specializes in heat and mass transfer and thermodynamics, and is also an adjunct professor at SUNY Orange in Middleton, NY. He has almost 20 years of experience in industry and previously worked as a senior process engineer for Croll Reynolds Co. and as an engineering manager for Exergy, LLC. Macleod earned his BS and MS in chemical engineering from Worcester Polytechnic Institiute and Northeastern Univ., respectively. He is a licensed professional engineer in New York and New Jersey.