|In most scenarios, when an employee flat out refuses to carry out an assignment, it is not long before that employee is flat out the door. At the same time, it helps to see if there may be any mitigating factors. |
The first step is to try to determine your employee's rationale behind his refusal to follow a directive. It is possible that something about the assignment may have been dangerous, unhealthful, or contrary to accepted standards or guidelines. Your employee's explanation in such a case will help you determine your next step.
However, in terms of the bigger picture, this is an employee who has tried to undermine your leadership on numerous occasions, and he apparently has no qualms about speaking maliciously about you to everyone else. This type of behavior is better known as insubordination, and it is also better known as unacceptable.
Your employee should be given some very clear counseling, as well as a clear understanding of the consequences if his antics continue. In a word, if they continue, he will not.