André Cincou is a Professional Engineer and Teaching Professor in the Department of Mechanical Engineering at Polytechnique Montreal, where he coordinates computer-assisted drawing courses in engineering and in mechanical systems modeling. His Guide to the Standards and Conventions of Graphic Representation, also published by Presses internationales Polytechnique, won the "Prix de la ministre de l'Education, du Loisir et du Sport du Québec" (an award from Québec's minister of education, recreation and sport) in 2011.
Christian Fortin is a Professional Engineer with Bombardier and a lecturer in the Department of Mechanical Engineering at Polytechnique Montreal, where he teaches the mechanical systems modeling course. He has made significant contributions to the writing of several reference documents used in the course.