Dr. Sims is a Professor at the University of North Carolina at Chapel Hill with joint appointments in the departments of Chemistry and Medicine. He founded Cell Biosciences (now Protein Simple) along with his colleague, Dr. Nancy Allbritton in 2002. Drs. Sims, Allbrittion and Wang were also founders of Intellego Corporation which became a subsidiary of Amkor Technology. Dr. Sims earned his M.D. degree from the Johns Hopkins University.