David began his career as a police officer in 2010, quickly noticing the gaps between academy training and real-world application. In 2014, he transitioned to a major secure logistics company, where his work took him from the frozen Arctic of Canada to the sunny beaches of the Florida Keys. During this time, he trained a wide range of clients while continually advancing his own skills through specialized courses, eventually accepting a full-time instructor position in 2020.

Today, David teaches a diverse array of skills—including pistol, shotgun, driving, baton, handcuffing, and flashlight techniques—drawing on his extensive field experience and careful study of real-world incidents. He brings realism and professionalism to every class, ensuring that whether a student is a raw recruit or a seasoned professional, they receive the maximum benefit from each course.