While diploma mills are probably the easiest, I would generally recommend an executive PHD from a reputable school as this is something that will go on your res

While diploma mills are probably the easiest, I would generally recommend an executive PHD from a reputable school as this is something that will go on your resume. Many PhD candidates fail to complete the dissertation, and executive PhD programs generally are a lot less stringent in this regard and are designed to make sure you actually finish and designed to be completed on a part time basis. However, you can still get the degree from a reputable university and have a good result.