A senior position opened in my org (saw job posting on linkedin) and I think I am highly qualified for this role. How should I approach this without ruining my relationship with my manager.
Connect with the future manager. Find out if you click with the future manager. As soon as you get the green signal. Meet with your current manager. Thank him/her for he/her support on your career goals. And ask for his/her support to your promotion.
Just ask for it. "What do you I need to demonstrate to get this role?"