To become a K-9 handler, you first need to go to school and get your degree in Criminal Justice. After that, you will need to become a police officer and work 1-2 years before applying for a K-9 officer position. If you are accepted to become a K-9 officer, you will go through training as well as on-the-job training. I recommend visiting the site below for a step-by-step guide on what you need to do if this is the career path you want to take. I will advise, that by becoming a K-9 officer, you will have to dedicate more hours than usual during training to get the bonding you need with your animal.