Use of chief as equivalent of boss

According to the OLD, the noun chief can be used for

a person with a high rank or the highest rank in a company or an organization.

However, while it of course appears in CEO and other job titles, I would always prefer to call refer to my line manager as my boss rather than my chief. Is this consistent with the usage by native speakers or does it depend on the region?

Solution 1:

boss OED

An original American equivalent of ‘master’ in the sense of employer of labour; applied also to a business manager, or any one who has a right to give orders. In England at first only in workmen's slang, or humorously, = ‘leading man, swell, top-sawyer’; now in general use in Britain.

This consistent with the usage by native speakers Ame. It is used in corporate America and in the American military with combat deployed units.