All Team

A US Army 82nd Airborne Reconnaissance Infantryman, and Operation Iraqi Freedom veteran (2008-2009), I also spend as much time as possible outside hunting and fishing. Having countless hours training with multiple weapon platforms from crew served weapons to pistols, and having trained military, law enforcement, and civilians. I organized Diamondback Training Center’s teaching methodology following Murphy’s law, and taking equal portions of military, law enforcement, and civilian training environments to give our students the best experience possible.

-NRA Certifications: Refuse to be A Victim Instructor, Range Safety Officer, Pistol Instructor, Rifle Instructor, Inside and Outside the Home Personal Protection Instructor
-Arizona Department of Public Safety, Unarmed and Armed Security Guard Instructor
-Arizona Game and Fish Hunter Education Volunteer Instructor
-Sabre Red OC Spray Instructor
-ASP Baton, Handcuffing, and Flashlight Tactics Instructor
-CPR Certified

Email: Roan.Grimm@grimmrealitiesacademy.com

A Former US Marine, Roan Grimm has dedicated his life to the study of the grim realities of violent close combat.  With 35+ years of martial arts, the past 27 of which have been focused on the weapon intensive Filipino martial arts (arnis/eskrima/kali) and WWII era American combatives (scientific dirty fighting). With over 125 real contact stick fights with the world renown Dog Brothers, Grimm has tested the theories of actual fighting with impact weapons at a level few can approach.

-Guro (black belt equivalent) in Nitullama silat
-Guro in Dog Brothers Martial Arts
-Ma’a Guro in Sub3 American Kali
-Full Dog Brother – “Poi Dog”
-Creator of ADEPT personal security program

Terence joined the Honolulu police department in 2001, and began serving with the Army reserves in 2003 as a combat engineer. He first deployed in support of Operation Iraqi Freedom in 2004. Terrence continued serving with the police department under the state sheriffs beginning in 2008, and moved to the Air National Guard deploying a second time as military police in support of Operating Enduring Freedom in 2013. He continued supporting the department through firearms instruction for three years beginning in 2015. Terrence has supported Diamondback Shooting Sports since his move here in 2018.

-ALERRT (Advanced Law Enforcement Rapid Response Training) Instructor Level 1 & 2
-CRASE (Civilian Response to Active Shooter Events)
-NRA Certified Law Enforcement Pistol and Shotgun instructor
-TEEX (Texas A&M) Law Enforcement Patrol Rifle Instructor
-Safariland Less Lethal OC Spray, Chemical Munitions, Less Lethal Munitions, Distraction Devices Instructor
-Hawaii DPS Baton, Handcuffing, ECD/Taser Instructor
-Standardized Field Sobriety Test Instructor
-Colt and Sig P320 certified Armorer
-Basic Life Support Certified