
Brian Duignan is a senior editor at Encyclopædia Britannica. His subject areas include philosophy, law, social science, politics, political theory, and religion.
Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree. They write new content and verify and edit content received from contributors.

The chief executive officer (CEO) is the senior manager or leader of a business or other organization, such as a nonprofit or nongovernmental organization (NGO). A CEO has final decision-making authority within the organization (subject to the general consent of a board of directors, if there is one) and holds a number of important responsibilities, including:
In the case of larger businesses and some other larger organizations, the CEO is hired or internally promoted by a board of directors, which may subsequently dismiss the CEO if it is dissatisfied with the personâs performance.
Business come in all sizes, from sole proprietorships to partnerships to corporations with thousands of employees. Each structure offers advantages and disadvantages. Learn about the types of businesses, how they are formed, and what you need to know to start your own business.
The specific duties and responsibilities of CEOs tend to vary with the size, structure, and culture of the organization and the nature of the industry or environment in which it operates. For example, the CEO of a small company is typically more directly involved in day-to-day operations and lower-level decision-making than the CEO of a large company.
This article was most recently revised and updated by Brian Duignan