The author, Professor Dennis Whang, initially studied chemical engineering at Yonsei University (BS and ME: received the top scholarship at the graduate school entrance exam), North Carolina State University (MS in chemical engineering), and Texas Tech University (PhD in chemical engineering). At later dates, he studied theology at Global Reformed Presbyterian Church of General Assembly (master of divinity), Reformed Presbyterian Theological Seminary of the East (master of divinity), Newburgh Theological Seminary (doctorate in theology), and New Jersey Theological Seminary (doctorate of ministry).

He has worked on research and consulting on chemical engineering at various research institutes and professional organizations, including the New Jersey State Environmental Protection Agency. He holds licenses as a professional engineer in several states in the eastern United States and asbestos and fire prevention-related professional engineer licenses.

He was the publisher of the monthly magazine Dry Cleaners Times for fifteen years (circulation of fifteen thousand), founded Hitech Engineering, PC as an engineering executive for over thirty years, and for over twenty-five years taught at the Center for Environmental Technology. And taught at New Jersey Theological Seminary, and LA Trade-Tech College.