Ludwig Keller is a mineralogist and X-ray diffractionist. For over thirty years, he has performed thousands of X-ray measurements on polycrystalline and single crystal materials for industrial and research applications as well as forensic and litigation support.  Since 1984, Dr. Keller has been president of CAMET Research, Inc.,  a service laboratory specializing in customary set-up of X-ray instrumentation to address the unique needs of the rapidly-changing world of materials. In 2000, he also founded Chemistry of Concrete, along with Mr. Neff, with the goal of providing expert analysis for the resolution of construction defect disputes. The company has grown in breadth and capability since its inception under their vision.