In my chemical engineering training in the 1960s, concepts of energy were rigorously defined by engineering physics studied in conventional thermodynamics, chemical reaction kinetics, and nuclear engineering. Subtle energy was not in my knowledge base. This article is intended to give the reader practical insight on several key energy principles applicable to spiritual healing from the perspective of an engineer who has become a spiritual healing technologist. My six years of college technical education and 43-year high tech science career in the design, development and implementation of advanced digital systems for government and industry disciplined me to investigate, challenge and explain the healing phenomena to which I have been exposed. I share here a few of my personal experiences in 29 years of energy healing and spiritual healing.