The job title, president, refers to the head of an organization as in the person who presides over or is in charge of an organization. (In some organizations, the president reports to a CEO who is the top leader; in others, the head of the organization takes on the title of president and CEO.) The president / CEO may also own the business and may have founded the business, so his or her commitment to the business is deep.
Whichever titles are used in an organization, the president is the top person in command in an organization and has specific responsibilities depending on the needs of his or her organization.
Thus, the president's job responsibilities can vary from organization to organization. As with any level of management in an organization, the president's role starts with the fundamental job responsibilities of a manager.