✔ 最佳答案
In a big company, usually called Corporation, there is a Board of Director. These directors usually make decision on the direction of the company, including hiring important, high level management staffs, like CEO, COO, CFO, etc.
The CEO hired is the HIGHEST ranking working to lead the company to follow the direction set by the Board of Directors, sometimes, the CEO would be one of the directors too. Let me know if you have further questions.