Doris returned to her Alma Mater in 2009 to become Founding Director of the Justice Center for Research, along with her teaching assignment as Professor of Sociology, Crime, Law and Justice. She retired from Penn State in December 2015. From 1994-2009 she was a Professor in the Department of Criminology and Criminal Justice at the University of Maryland, serving as Director of the Evaluation Research Group from 1996-2009. Dr. MacKenzie has testified before committees of both the U.S. Senate and the House of Representatives, and has served as Principal or Co-Investigator on 20 funded research projects, among them: “An Experimental Study of Maryland’s Correctional Boot Camp,” “Multi-site Study of Correctional Boot Camps,” “Probationer Compliance with Conditions of Supervision,” and “The National Study of Juvenile Institutions.” She has an extensive record of publication in Refereed Journals, book chapter contributions, and most notably her 2006 book, What Works in Corrections: Examining the Criminal Activities of Offenders and Delinquents, published by Cambridge Press. She is a highly sought after speaker on such issues as Boot Camps, Reentry, Offender Education, and Juvenile Justice. She is a Fellow of the American Society of Criminology. Recipient of a 2007 Fulbright Research Scholar Grant, Dr. MacKenzie has taught classes in China, and presented at conferences at the United Nations, Vienna, Austria, Stockholm, and Paris.
Doris is the recipient of the prestigious 2017 Center for Evidence-Based Crime Policy Distinguished Achievement Award, the 2015 Lifetime Achievement Award for the Division on Corrections and Sentencing, and the 2011 Academy of Experimental Criminology Joan McCord Award.