Security License D is a Florida unarmed Officer 4-day course  The security officer license D course is offered in southeast Florida by Florida Security Licensing & Firearms Defensive Training, and in central Florida by Florida Security License & Defensive Training. These schools distinguish themselves through their comprehensive approach to security training, Florida security licensing, and particularly in the realm of firearms defense. Here are some aspects that set them apart: Experienced Instructors: Our training school is proud to have highly experienced instructors. The lead instructor has 35 years background in law enforcement, followed 7 years in security and executive protection.