Before joining local law enforcement, Rob Curran ascended to the rank of sergeant during his four years of service in the US Marine Corps. Meanwhile, Denis Donovan earned his sergeant rank in the US Army after tours in Iraq and Kuwait, and then worked as a police officer and SWAT-team operator. In 2011, the pair founded Tactical Dynamics Firearms Training, LLC, where they teach a full range of personal defense training ranging from basic firearms safety classes to advanced live-fire training. Joined in 2013 by James Wise, the team of instructors hold instructor ratings from the NRA, Sig Sauer Academy, Safariland, General Dynamics, and the Massachusetts Police Training Council, and are Massachusetts State Police Certified Firearms Safety Instructors. In addition to in-depth instruction, Tactical Dynamics Firearms Training provides Simunition-based personal defense training, and they outfit customers with customers with handmade and custom-modeled holsters and magazine carriers.