Dr. Barent (Barry) Walsh is a Clinical Social Worker, educator, and one of the earliest and most influential figures in the study and treatment of self-injury. Author of Treating Self-Injury: A Practical Guide, a foundational text for clinicians, Dr. Walsh has trained thousands of professionals in compassionate, evidence-based care. His decades of work have profoundly shaped the clinical understanding of self-injury, emphasizing empathy, validation, and therapeutic skill. Dr. Walsh continues to consult and teach internationally, bridging the gap between research and frontline practice. He is widely admired for his humility, generosity, and unwavering commitment to improving the lives of those with lived experience of NSSI. For many, Barry is a symbol of a true science-based clinician. He epitomizes the spirit of collaboration, approachability, and friendship that is a hallmark of ISSS.