Postdoctoral researcher in the physics department at a major university. There are plenty of postdoc positions out there, only a Ph.D. in physics required with a thesis in a relevant subfield. Our group works on experiments at labs in Europe and Japan. We typically go to the experiments for a few weeks at a time; I logged about 50K miles last year. Unlike the previous posters, I sometimes find the concept of a "regular job" where you can be at home most of the time rather attractive.