Contek is a consulting and software design firm specializing in Quality Control and Mix analysis solutions for the construction industry's Aggregate, Concrete and Hot Mix Asphalt producers. Based out of Montreal, Quebec Canada with a second office in Dallas Texas, Contek has provided tailor made solutions to medium and large size material producers for over 11 years. Our in-house Concrete experts, Jim and Jay Shilstone, together bring over eighty years of industry experience to the table. Their tireless efforts in Concrete mix optimization and improved Aggregate grading, has profoundly changed the way in which we see and think about Concrete. We are all very proud to offer unparallel expertise with every copy of our exclusive Quality Control technology.