Dr. Robertson is a Physical Scientist in Physical Measurement Laboratory at NIST. He received a B.S. in Chemistry from the University of Kansas and a Ph.D. in Chemistry from the University of Arizona. Prior to joining NIST, he was a post doctoral fellow at the Max Planck Institute for Polymer Research in Mainz. Joseph joined NIST through a National Academy of Sciences/National Research Council Research fellowship. His current research interests included molecular and ion transport in model membrane systems, single molecule biosensors, electrochemical charge storage, and the structure-function relationship in protein and synthetic macromolecules.