* Your state's TRS rules: Each state's retirement system has its own specific regulations regarding post-retirement employment. Some states have strict rules about working for the same employer (or a closely related one) after retirement, while others are more lenient. You must consult your specific state's TRS rules and regulations. Their website is the best resource.
* The type of work: The type of position you'd be taking likely plays a significant role. A full-time teaching position is far more likely to be subject to restrictions than a part-time, temporary, or non-instructional role (such as a substitute teacher with limited hours).
* Earnings limits: Many TRS systems have annual earnings limits. If you exceed these limits, your retirement benefits may be reduced or suspended. Again, this varies by state.
* Early retirement: If you retire early from TRS, the restrictions might be even stricter than if you retire at the standard retirement age.
In short: You absolutely must contact your state's Teacher Retirement System directly to find out the specific rules and regulations regarding post-retirement employment. Don't rely on general information; only the official TRS guidelines for your state will provide the accurate answer for your situation.