Guy du Plessis has worked in the addiction treatment milieu for more than 15 years as a head of treatment, clinical director, program director, counselor, trainer, and program developer. In addition to his position as a faculty mentor at CalSouthern, he is the managing director and co-founder of the Integral Recovery Institute, and a researcher at Momentum Mental Healthcare South Africa.

Guy has published several articles on the application of Integral Theory in addiction treatment and research, and is the author of the book An Integral Guide to Recovery: Twelve Steps and Beyond. Guy is the developer of the Integrated Recovery model and the Integrated Recovery therapy/coaching method. His main research interests are the application of Integral Theory in the fields of addiction treatment and research, existentialism, and Jan Smuts' theory of holism.

Guy is a musician, avid reader and Zen student. His favorite activity is spending time with his beloved daughter Coco, who teachers him the joy and wonder of being in the world.