Retired state and municipal workers may be employed by a MERS participating municipality for up to 75 working days or 150 half days per calendar year. For non-teaching positions in a public school we use a school year.
If you exceed 75 working days or 150 half days, your pension will be suspended. (For non-teachers a "half day" is defined as working up to 4 hours. A "full day" is defined as working more than 4 hours.)
You may work without restrictions for any municipality that does not participate in MERS.