When Lithuanians in Lithuania translate their job titles into English, they tend to over-use "Director", partly because it sounds more like „Direktorius“ and partly because they appear to feel that it sounds more prestigious than "Manager". In general, in English-speaking countries the "boss" of a private firm tends to be called the Manager (or General Manager if it is a very large firm). "Director" is used more in public sector institutions and "Director-General" mostly just in Government Departments.

I'm not sure that "CEO" is a suitable translation, because, as I understand it, in a very large company that has a Board of Directors, the Chairman of the Board (not the General Manager) is the CEO.