To become a trainer means to undergo the process of becoming a professional who helps others to improve their skills, knowledge or fitness level through education and guidance. Full definition
This led you to becoming a trainer for businesses to learn how to work best with deaf people. (wiseinkblog.com)
A trainer's job, in short, is to teach you to become a trainer of your own dog. (k9web.com)
This only implies that you can turn out to become a trainer as a career but continue to be a blessing to other persons by way of your profession. (religion.blogs.cnn.com)