An "Ex-CEO" refers to a person who has previously held the position of Chief Executive Officer in a company but is no longer in that role. This change can occur for various reasons, including retirement, resignation, or being replaced. The ex-CEO may still have influence or involvement with the company, often serving as an advisor or board member. The role of a CEO is crucial, as they are responsible for making major corporate decisions, managing overall operations, and acting as the main point of communication between the board of directors and corporate operations. An ex-CEO may leave behind a legacy that impacts the company's future direction and culture.