Since 1979 more than 40 individuals have been recognized for their lifetime achievements in the AMCA Memorial Lecture. These individuals have included luminaries such as Carlos Finlay, Leland Osian Howard, William Herms, Andy Spielman, and, most recently, Fred Knapp (2018). Only one of these individuals recognized, Harold Gray in 1987, was an engineer. Engineers are problem solvers, and mosquito control is, most assuredly, an enterprise fraught with problems. Thus, the selection of William R. Opp as the 2019 honoree is both timely and well deserved. Bill Opp's career is a testament to an individual who made a difference in the lives of countless individuals.