I conducted 45 years of applied research and development concerning human cognitive performance and fatigue. I focused mainly on the measurement and analysis of human physical and cognitive performance in military and civil aviation; highway, rail and maritime transportation; and night and shift work. Operator fatigue was at the center of my interests after my days as an Air Force pilot in the C-130E Hercules tactical transport in Vietnam. I'm also the author of "Fatigue" in McGraw-Hill's Controlling Pilot Error series (2001), and the ASIS CRISP report "Fatigue Effects and Countermeasures in 24/7 Security Operations" (2010). Since January 2018 I have been teaching Physiology as an Adjunct Professor in the Department of Life Sciences, Texas &M University-Corpus Christi.