For almost thirty years— since 1993— Ian Brennan has successfully trained over one-hundred thousand people across the country (as well as Europe, Africa, Asia, and the Middle East) in violence prevention, anger-management, and conflict resolution at shelters, schools, hospitals, clinics, jails, and drug-treatment programs, including such prestigious organizations as the Betty Ford Center, Bellevue Hospital (NYC), UC Berkeley, and the National Accademia of Science (Rome). 

His presentations are consistently reviewed as "the best" of their kind and, when studied, frequently demonstrate significant reductions in aggressive incidents, complaints, and injuries (e.g., a 1996 study revealed more than a 50% reduction in such episodes and was written up in a feature article on the front-page of the east bay’s major daily newspaper, The Tribune). 

These trainings are based on over 15 years experience working as a mental health specialist in locked, acute-psychiatric settings, the job rated as “the most dangerous” in the state of California. From 1991 to 2001, he conducted psychiatric triage-interviews in the county emergency-room for Oakland, CA (one of the busiest in the country). 

Additionally, he works throughout the United States providing one-on-one, anger-management sessions for individuals facing criminal charges due to violent conduct, and, relatedly, provides expert testimony in such cases. 

He is also the author of seven books, including Anger Antidotes (published April 2011 by W.W. Norton [NYC]), Hate-less, and How Music Dies (or Lives).