Kristin Neff, Ph.D., is an Associate Professor of Educational Psychology at the University of Texas at Austin and a pioneer in self-compassion research, having conducted the first empirical studies in the field. She is the author of Self-Compassion: The Proven Power of Being Kind to Yourself (William Morrow, 2011) and co-founded the nonprofit Center for Mindful Self-Compassion (CMSC).

Mieshelle Nagelschneider is an American cat behaviorist, author of the eponymously titled book The Cat Whisperer and founder of The Cat Behavior Clinic in Portland, Oregon..

Dr Sandi Mann is a Senior Psychology Lecturer at the University of Central Lancashire and an experienced workplace consultant with her own private clinic. She has authored over twenty psychology books published in the UK and internationally, including Psychology: A Complete Introduction and The Psychology Bible: The Definitive Guide to the Science of the Mind.

Lisa Feldman Barrett is a neuroscientist, psychologist, and author known for her work on the science of emotion. She is the author of How Emotions Are Made: The Secret Life of the Brain and Seven and a Half Lessons About the Brain. A world expert in the psychology of emotion, she is also an elected member of the Royal Society of Canada and has received funding from the National Institutes of Health.

Michael Nehls is a German doctor of medicine, author, and former competitive cyclist]. From 1983 until 1989 he studied medicine at the universities of Freiburg and Heidelberg.

Bessel van der Kolk is a Boston-based Dutch-American psychiatrist, author, researcher and educator.