Summary : The private security canine handler in today's world. The objective of this work is to provide you with a comprehensive and detailed understanding of the private security canine handler's world. First and foremost, we will examine the evolution of security needs, thus highlighting the increasing importance of this profession. Next, we will study the essential role of the canine handler in the current context, shedding light on the daily challenges they face. We will also delve into the key skills required to be an effective canine handler, such as mastery of training techniques and communication with the security dog. Private security has become a priority.