Coach And Instructor Spotlight
Critical Defense Group – Greenville, TX
Elite tactical and firearms training led by U.S. Marine Corps veteran Eric 'Mac' Mackinzie
✍️By ZRIntel Editorial Team📍Greenville, Texas
Critical Defense Group ( is a premier firearms and tactical training academy located in Greenville, Texas. Founded and led by Eric 'Mac' Mackinzie, a U.S. Marine Corps veteran with over 25 years of experience in personal protection and firearms instruction, the academy offers a comprehensive range of courses designed to empower individuals and organizations with the knowledge and skills necessary for personal safety and responsible firearm ownership. Mac's extensive background includes serving as a high-threat protection specialist with the Department of State and as a training division member at ACADEMI (formerly Blackwater). His leadership ensures that students receive instruction rooted in real-world experience and professionalism. The academy's offerings include courses such as Critical Handgun Level 1, Critical Carbine AR-15, Critical Shotgun, Active Shooter Critical Handgun, and various scenario-based training sessions. These courses cater to individuals of all skill levels, from beginners to advanced practitioners, and emphasize practical application, situational awareness, and defensive tactics. Additionally, Critical Defense Group provides specialized training for churches, businesses, and schools, focusing on active shooter response and emergency preparedness. The academy also offers private and personal training sessions, allowing for tailored instruction to meet specific needs and goals. To learn more about their offerings or to schedule a training session, visit Know a coach or range that deserves to be featured? Submit here: Follow ZRIntel for daily coverage of firearm training innovations and community stories. Featured in this article? Let us know well highlight your repost on our feed!