noun
A direct loanword from English, used in business and organizational contexts to refer to the highest-ranking executive, such as a CEO.
彼はその会社のチーフエグゼクティブに就任した。
He was appointed chief executive of the company.
Variant with a middle dot, sometimes used for clarity or in formal contexts.
CEO is a more specific and common term for the top executive of a company, while チーフエグゼクティブ can be used more broadly for any chief executive role.
Borrowed from English 'chief executive'.