I work in manufacturing in the state of Michigan. Currently I'm qualified with the company to train new-hire personnel in my role. I've had the train-the-trainer classes, can certify them on forklifts, am being asked to teach a class even… the whole 9 yards.
Lately the dwindling benefits of being a trainer are quickly being outweighed by the slowly-growing amount of drawbacks, inconveniences, and stress. I'm preparing to inform my manager soon that I no longer have any interest in training new-hires. And by that, I mean I'm straight up done with it.
What might I expect to happen if oppose this decision? As far as I know since it's not in my job description and was never part of any promotion or agreed upon with a raise, it can't be added as a job duty later, but I can't find anything about training specifically when it comes to job duties being optional/mandatory. Any legal ramifications in my state?