I'm going to try and sum this up as best I can...
Started working at a new company last year, I was hired as the only scrum master in the company for a specific team, but also to help all of their teams adopt scrum, 7 in total.
After spending the first 6 months setting up all the teams and getting them to a somewhat self-reliant state, my boss received a promotion and I was transferred to a new boss.