In Gibble v. Car-Lene Research, Inc. (1998) 67 Cal.App.4th 295, the defendant's office manager had sole, unfettered authority to hire and fire employees, to authorize payment of their wages, to authorize or withhold payments, to interview subjects, and to conduct defendant's core business activities in the pertinent region, apparently without oversight from any other manager or officer of the corporation. (Id. at p. 313.) The Court stated that service is valid if the person served as "general manager" is in charge of the corporation's office or headquarters, as long as the person served is of such rank to make it reasonably certain that the corporation will be apprised of service.