I am hoping for some advice on a situation at work. Background is that I joined a big organisation a year and a bit ago. I used to have a senior title, but have gone a level down to be able to join this company. I love my job and the company, it's my dream environment where I can learn, thrive and progress. The only issue is that I don't get on with my manager. We clash on a lot of different subjects, I frequently disagree with the strategy, how things should be done etc. I should say that I have been hired as a the subject matter expert in this field (whereas my manager is not), so he is often forced to reluctantly listen to and take into account my opinions. I think he is resentful of this and is threatened by me, because to a lot of others I am the expert and leading the direction of the team. So, having been in this position for about 6 months during the summer, I've applied for a couple of internal opportunities, which I discussed with him at length, and it became clear that he didn't want to lose me, so tried to discourage me. I still applied and didn't go through. However, I am back where I was now, and having had a particularly terrible clash with my manager, and I starting to have conversations about moving to a different area of the company. Once I inevitably do start putting wheels in motion, my question is how should I position this to my manager, given that I've already said that I love what I do? I've already told him that I am keep to move up to the the next level (his level). Is it as simple as saying that a promotion opportunity has come up and I am going to go for it?