R. Khouri is a CAD Engineer, CAD manager, Corporate trainer and Educator he has worked with big industries and create training institution in Quebec (Canada) and delivers training to corporate clients in AutoCAD. He is Currently Autodesk Developper and author authorized .You can get more on AutoCAD and Autolisp/Visual lisp from TutoCADRachid Khouri
Other contributor
Below are other people who help CADnotes to develop contents. They help us for editorial and ideas for articles.

I am currently working on a civil engineering degree and working part-time doing AutoCAD, Revit, site inspections, cost estimates, and CAD/BIM tutoring. I have taught AutoCAD and Revit courses as an adjunct professor. My goal is to become a reputable structural engineer. I enjoy being outdoors and cooking.
You can reach me on twitter: @ThatCADguy

Mike Mattson is a 20 year veteran of the CAD industry. He learned AutoCAD at r13 (Oh! It’s Windows based!) and currently uses Microstation V8i to design electrical substations in the United States. He enjoys reading, motorcycling and puzzling through poorly documented CAD software features. He lives with his first wife and only daughter about 400 miles southeast of the geographic center of North America.