Black tie events to birthday parties- We have you covered! Liongate Security is Atlanta's #1 Security Company, offering experienced and professional staff that will be sure to add major value to your event or venue. Liongate Security works with many of the biggest events and best venues in the Atlanta area. Liongate Security offers armed & unarmed guards, police officers, and much more. We are your events first impression and first line of defense, and we take both very seriously.