The U.S. Department of Labor Occupational Safety & Health Administration or OSHA has passed a requirement that all employers train forklift operators in proper driving and safety precautions. While a person does need to certified to operate a forklift, there is no special or specific certification that OSHA requires to become a certified forklift trainer.
Certified Forklift Trainer
Become certified, meeting OSHA's minimum standards, to operate a forklift through your employer. Fulfill these standards by being at least 18 years of age, having a clean criminal record and mastering truck- and workplace-related topics. Forklift certification is good for three years.
Gain experience operating a forklift. Show others how to do so. OHSA simply states that a "qualified trainer" should be someone "who by extensive knowledge, training, and experience and has demonstrated the ability to train and evaluate powered industrial truck operators."
Approach your employer and request training. Pursue the training, if necessary, on your own. There are schools that offer online lessons, training and testing.