I have just resigned after 16 years at my current place, so I can understand your feelings. However, 3 years ago I made a mobility move within the company to a

I have just resigned after 16 years at my current place, so I can understand your feelings. However, 3 years ago I made a mobility move within the company to a different division. To non-experts the new role looked similar form the outside, but almost everything was different: the people, (most of) the systems, even the culture, how the work was organized and appreciated, and so on. I experienced some sort of a culture shock. One of the problems I had to address in the new role was attrition and I kept telling people to give some time to their jobs to get a better understanding of what it was about and what opportunities it offered, and fought the same battle inside with myself to walk the walk not just talk the talk. What I kept reminding myself about was that I should not compare the new role to the old one over and over again (except when there was some specific need). Instead, I just believed that my experience would help me help others. I was still the most senior guy in the team and after understanding where the biggest needs were, I started thinking about how I can address them, and came up with ideas which I went on to implement. They were much appreciated. Another thing that worked well for me was to put all the warnings and indirect information I had received before my move on the back seat and give everyone a chance to start with a clean slate. I was very disciplined about that and as a result I could fix some historically very tense relationships between locations. I think if you approach people in an open-minded fashion, most of them will be happy to cooperate (except those whose interest dictates the opposite). Also, don't be afraid to ask questions even about dumb things. I found that a lot of people with some experience are happy to share their knowledge and explain things to you. Listening to them will create mutual respect. And you will also understand who knows what and who you can count on. Just be patient with yourself and you will find that you have the skills to be good at the new place. EDIT: fixed some grammar problems