Is there a way to 'turn this situation to our advantage'? [=is there a way to exploit this situation?; is there a way to take advantage of this situation?]
The union should be 'at an advantage' [=should have an advantage] in the negotiations.
She used her position for personal 'advantage'. [=for personal gain; to help herself]
(..) Yes? You said you were having dinner at your parents' house. - What do you think you're doing? - Look. This lady is trying to be polite, and you're taking advantage of her. - Give her the money that's hers. - I must see proof that... Look. I came out of her womb... and I am telling you (..)1974 The Gambler