Michael Chajewski received his undergraduate degree in experimental psychology from the University of South Carolina, and a masters degree in forensic psychology from John Jay College of Criminal Justice, The City University of New York. He received his doctoral degree in Psychometrics and Quantitative Psychology from Fordham University. As a psychometrician, Michael worked for eight years for the College Board supporting operational testing programs such as PSAT/NMSQT and AP, as well as assisted in the redesign of the SAT. His contributions and research spanned a variety of technical work including equating, test security and system development. Since 2017 Michael has been leading the psychometrics team at Kaplan Test Prep, spearheading measurement model development for formative assessment and innovating assessment operating procedures. As an educator, Michael has taught both undergraduate and graduate courses within the CUNY system as well as at Fordham University. His research interests include configuring adaptive assessments, large data model fit evaluations, missing data impact, scaling, norming, as well as statistical software development and Bayesian statistics.