Callie I. Higgins, a materials research engineer at the National Institute of Standards and Technology (NIST), has won the Samuel J. Heyman Service to America Medal in the Emerging Leaders category. Higgins is one of seven medal winners of 29 finalists selected from more than 350 nominations for the “Oscars of public service.” Medalists are chosen based on their leadership and innovation, as well as the impact of their work on the health, safety and prosperity of the country.