Rules for Returning to Work
Regardless of your age at retirement, general employees who retire won’t be eligible to return to work as extra help or under a contract for a SamCERA employer for a period of 180 days following retirement, except under special circumstances.
Safety employees cannot return to work within 90 days of retirement if they retire at an age younger than 53, except under special circumstances.
Additionally, the Government Code limits retirees to 960 hours of post retirement service per fiscal year.
Your retirement application has more details, so make sure to read it carefully and understand your options.