System Analyst (SA) is an operator who is responsible for designing and developing application software systems, making them correctly reflect effective information, and assisting business operators to manage and operate the company.
IT consultant is to provide people with IT consulting services. Give advice to others
The full name of CIO is Chief Information Officer in English, and it means Chief Information Officer or Chief Information Officer in Chinese. In some foreign companies, this position is corresponding to other senior managers of the company, such as Chief Executive Officer (CEO) and Chief Financial Officer (CFO), but the power is less than that of CEO. Some countries (such as the United States) also have such positions in government agencies or non-commercial organizations.
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The relationship between them: the system analyst designs the system, he can consult the IT consultant, and the CIO decides the technical direction and development trend of the company, which belongs to the top management.
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Being an executive is definitely better, and generally being a system analyst is very good.
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You can undertake these three tasks at the same time, but in a big company, each task can only be divided in detail.