Hopps also became an administrator after the administrative transfer of biologics from the NIH to the Food and Drug Administration (FDA) in 1972, first as the assistant to the Director of Biologics , and then as acting Associate Director for Program Development & Operations, working in Building 29.
After retiring from government service, Hopps continued to work as a consultant and guest worker in the FDA’s Center for Drugs and Biologics (which would later be renamed the Center for Biologics Evaluation and Research [CBER], as it is still called today).