John Unguris, a Project Leader in the CNST Electron Physics Group, has been designated a 2011 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 annually to fewer than one percent of the 42,000-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. Unguris leads multiple projects at the CNST, investigating techniques to measure the properties of magnetic nanostructures, with a focus on spin sensitive electron microscopy. He is an author of over 80 publications, a Fellow of the American Physical Society, and a recipient of the Bronze Medal from the Department of Commerce. He will be recognized as an Outstanding Referee on March 21, 2011 during the prize and award session at the 2011 APS March Meeting in Dallas Texas.