I worked at a small rural US post office where I was literally the only employee. I loved this job so much that I thought I might stay until I retired. There was a promotion available at another office that was 28 miles and a mountain pass away. I was told I had to take that promotion. I had no choice. I decided I did have a choice, found another job, and resigned. For the record, I spoke with my boss, his boss (POOM), my local union rep, a high ranking union rep in Washington, and a lawler trying to get out of it. The problem is the CBA. It spells out the particular promotion I was offered (PSE to PTF) is mandatory. You cannot turn it down, period.