> If you've ever said "this isn't my job" then you will have only an adversarial relationship.
I say that all the time to other managers and occasionally to my direct manager.
I'm the only software engineer on staff and we have a pisspoor IT provider, if it's windows I don't touch it because if I do I'll 'own' it and I'm busy enough.
Learning to say no when it's not in your interests isn't adversarial, as an old boss put it pithily "If you don't respect your time no one else will".
I was hired to write software, we pay a third party for desktop IT, if I then start doing IT technician tasks I'd be the most overpaid IT technician in the country and we'd still be paying for support.
I say that all the time to other managers and occasionally to my direct manager.
I'm the only software engineer on staff and we have a pisspoor IT provider, if it's windows I don't touch it because if I do I'll 'own' it and I'm busy enough.