'Can an employer terminate a part time employee if the position calls for a full time work and the part time employee opted not to go on a full time employment?'
2 Answers from Attorneys
in general, unless an employee is civil service, in a union, or has a written employment contract, they are an 'at will' employee that can be disciplined or terminated any time for any reason, with or without ‘cause’, explanation or notice.
I assume that you are a California employee, and that you are an "at will" employee (almost all employees are "at will").
In this case, your employer has the right to terminate your employment for any lawful reason, or for no reason at all. The fact that you and your employer can no longer agree as to your hours would indeed give your employer sufficient reason to terminate your employment.
I hope this helps.