Can new owner once has me sign my job responsibilies will remain the same paper then 1 month later change them?

  Before I respond to your inquiry, I must state that we have not spoken, I have not reviewed the relevant documents and facts, and I do not represent you. Therefore, my discussion below is not a legal opinion, but is informational only. Finally, my discussion applies only to issues to which Pennsylvania or Federal law apply, unless otherwise specified.That being said, unless you have a contract that states otherwise, Pennsylvania is, by default, an "at-will" employment state.  This means that you or your employer can terminate your employment relationship for any reason or no reason at all.  This also means that your employer can change your work hours and responsibilities as well.  As far as overtime is concerned, generally, overtime is to be paid for any amount of time you work over 40 hours per week, regardless of how you reach those 40 hours.  Therefore, if your employer does not have you working over 40 hours, they do not have to pay you overtime wages.If you would like to discuss this matter further, please feel free to contact me.