Yes, EDITOR is a Scrabble word!

Letter values in Scrabble US: E 1, D 2, I 1, T 1, O 1, R 1.

Is it a valid word?

EDITOR is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

a person responsible for the editorial aspects of publication; the person who determines the final content of a text (especially of a newspaper or magazine)
(computer science) a program designed to perform such editorial functions as rearrangement or modification or deletion of data

Also: editor in chief, editor program.