private secretary

noun

a person who attends to the individual or confidential correspondence, files, etc., of a business executive, official, or the like.

Origin

1765-75

Examples from the web for private secretary

And now he has allegedly been caught in bed with his former private secretary.
Meanwhile even a private secretary could afford to be happy.
If she becomes private secretary to the boss, she must never forget where she started.

British Dictionary definitions for private secretary

noun

a secretary entrusted with the personal and confidential matters of a business executive

a civil servant who acts as aide to a minister or senior government official Compare parliamentary private secretary