An employee who has accepted a status appointment shall be on probation for no less than six months and no longer than 12 months. In an at will state, there's typically no legal difference in firing someone during a probationary period or after it.2) An employee who has accepted a status appointment shall be on probation for no less than six months and no longer than 12 months. A probationary period of six months shall be served by: 1) an employee who enters State service or commences a new period of continuous service. Probation is typically a trial period during which an employee is observed and monitored to determine whether he or she is suitable for the position. What is Wrongful Termination? A probationary period can be a month, two months, 90-days or even a year. First things first, unless you have a contract that guarantees your employment (usually a union worker), you are always a probationary employee. The probationary period policy should specifically state employment is at-will and completing the probationary period does not guarantee job security.