In California, there is a presumption of at-will employment absent an express agreement specifying the length. It does not matter where you were born or what your legal status is.Some aspects of separation agreements may not be legal in the state of California, which has particularly strong protections for workers. The new law addresses the "employment status" of workers when the hiring entity claims the worker is an independent contractor and not an employee. 1. No. California assumes that all employment relationships involve a contract, whether it is verbal or in writing. This means that all employers have the right to terminate employees at will, for almost any reason, or for no reason at all. California has strict laws regarding employer-employee relationships. The state considers all employment relationships to involve a contract, even a verbal one. An employment contract does not necessarily need to be in writing. In California, certain exceptions exist to the rule that an employer can fire an at-will employee for no reason.