How to push back a peer so that organisational lines are respected.
I am a Director in a large, European multinational company running a function within in a business unit. I have a peer who sits within our corporate HQ who is constantly getting involved in my work area and crossing the border between a corporate staff job and business execution. I (and I know his boss) see his role as much more about coordinating between units. He sees his role as much more hands-on and direct execution focus and therefore likes to get involved in everything I do. Occasionally he cuts me out of meetings or tries to steel work.
On a personal level, we get on well but are, frankly, engaged in a small organisational turf war over visibility and glory. I know what I should do- just do what's best for the organisation, focus on communication and being effective. But frankly....I want to win this organisational battle. Any suggestions or advice?