Dr. Jeffrey Fagan is a staff scientist in the Materials Science and Engineering Division at the National Institute of Standards and Technology (NIST) in Gaithersburg, Maryland. Part of the Complex Fluids group, he currently leads the Particles, Tubes, and Colloids Project, which is addressing metrological and processing barriers for single-wall carbon nanotubes (SWCNTs) and other nanomaterials in the service of NISTs role in promoting US commerce. From his activities at NIST, Dr. Fagan is an author on 50+ peer-reviewed publications in the areas of colloidal and nanoparticle science. Prominent publications including multiple methodologies for the fractionation and characterization of dispersed carbon nanotube materials for specific properties, and the characterization of dispersed particle properties via analytical ultracentrifugation. Current activities include a continued focus on separating SWCNTs by their physical properties, and characterizing nanoparticle populations via analytical ultracentrifugation. Dr. Fagan additionally serves as the lead scientist for the production of SWCNT reference materials (RMs) and standard reference materials (SRMs) at NIST, and is the chair of technical working area 34 under the Versailles Project on Advanced Materials (VAMAS, an international pre-standardization organization), focused on fostering development of metrology standards for nanoparticle populations. Dr. Fagan has won multiple awards for his work at NIST, including a 2010 Presidential Early Career Award for Scientists and Engineers (PECASE), a NIST Bronze Medal in 2009, a Department of Commerce Silver Medal in 2013, the NIST Sigma Xi chapters Young Investigator Award in 2013, and a National Research Council post-doctoral fellowship in 2005. Dr. Fagan had earned his BS degree in chemical engineering from Johns Hopkins University in Baltimore, Maryland, and his Ph.D. in chemical engineering from Carnegie Mellon University in Pittsburgh, Pennsylvania.