Dr. Ian Shaw is S R Nathan Professor of Social Work at National University of Singapore and Professor Emeritus at the University of York, England. He was the first chair of the European Social Work Research Association (ESWRA) and a founder editor of the journal Qualitative Social Work. He has authored almost 100 peer-reviewed papers, more than 20 books, 60 book chapters, and various research reports. He has written extensively in the journals on issues arising from the relationship between social work and sociology over the last century. His more recent books include Social Work Science (2016) and Research and the Social Work Picture (2018). He is pursuing a graduate programme in creative writing, which sits alongside his interests in gardening, his local church, volunteering in his village shop, playing badminton (badly), and Bob Dylan.

Jennifer C. Greene is a Professor Emerita of Educational Psychology, University of Illinois Urbana-Champaign. She received her BA in psychology from Wellesley College and her PhD in educational psychology from Stanford University. Prior to Illinois, Greene held faculty positions at the University of Rhode Island and Cornell University. Greene's work focuses on the intersection of social science methodology and social policy and aspires to be both methodologically innovative and socially responsible. Greene's methodological research has advanced qualitative and mixed methods approaches to social inquiry, as well as democratic and values-engaged approaches to evaluation. Greene served as a coeditor-in-chief of New Directions for Evaluation and is currently an associate editor of the Journal of Mixed Methods Research and series coeditor for Evaluation and Society. She also coedited the SAGE Handbook of Program Evaluation and authored Mixed Methods in Social Inquiry. Greene is a past president of the American Evaluation Association.

Melvin M. Mark is professor of psychology at the Pennsylvania State University, where he also is Head of the Department of Psychology. He has served as President of the American Evaluation Association (AEA). He was Editor of the American Journal of Evaluation (and is now Editor Emeritus). A social psychologist, Dr. Mark has wide ranging interests related to the theory, methodology and practice of evaluation, as well as a general interest in the application of social psychology to evaluation and applied social research. Dr. Mark's awards include the American Evaluation Association's Lazarsfeld Award for Contributions to Evaluation Theory. He is author of more than 125 articles and chapters in books. Among his books are Evaluation: An integrated framework for understanding, guiding, and improving policies and programs and the co-edited volumes Social Science and Social Policy; SAGE Handbook of Evaluation; What Counts as Credible Evidence in Applied Research and Evaluation Practice; Evaluation in Action: Interviews with Expert Evaluators; and Social Psychology and Evaluation.