João Santos is the manager and main instructor at QualiCAD (www.qualicad.com), one of the most important Portuguese ATCs (Authorized Training Centers), based in Lisbon. With a degree in Mechanical Engineering, he has been teaching AutoCAD for more than 25 years now and is an ATC coordinator for almost 20 years. He is an AutoCAD 2013 and 3ds Max 2013 Certified Professional User and Instructor. He is also the Portuguese instructor in these technologies with more students. He is the author and co-author of more than 40 AutoCAD and 3ds Max books, all written in Portuguese.