NIST Fellow Mark Stiles has been designated a 2010 Outstanding Referee by the American Physical Society (APS). This lifetime APS award was initiated in 2008 "to recognize scientists who have been exceptionally helpful in assessing manuscripts for publication in the APS journals." The status is conferred to only a small percentage of the 44,000-strong referee pool, and is awarded to show appreciation for the essential work that anonymous peer reviewers do for the journals. It recognizes how the reports and advice of these referees have helped to advance and diffuse the knowledge of physics, while creating a resource that is invaluable to authors, researchers, librarians, students, and readers. Mark is a Project Leader in the CNST Electron Physics Group, performing fundamental calculations that broadly elucidate the properties of nanostructures, ranging from magnetic materials and devices, to superconductors, to graphene. He will be recognized as an Outstanding Referee on March 15, 2010 during the prize and award session at the 2010 March Meeting of the APS in Portland, Oregon