I guess I am old enough to sometime look back on my career and be amazed how it has turned out. At this point, I think I've gone a full circle and coming back almost to where I started.
When I was doing my PhD research, it was in superconductivity. I was doing experiments on tunneling spectroscopy of high-Tc superconductors. Then I moved and did my postdoc in photoemission spectroscopy, and a large portion of the material that I studied were superconductors as well. Next, I switched careers and went into accelerator physics and learned a whole new field of study in physics. Eventually, I found my niche and went to study and make photocathodes for accelerators, which made used of my knowledge and skills from my photoemission work.
And now, things have come full circle. I've started work on studying and producing superconducting photocathodes for superconducting RF guns. I've gone back to the first area of study that I started. Although, I must admit that this study utilizes my knowledge from both areas that I've specialized in. So I'm actually rather excited to go into this.
Still, it is funny how life takes you on your journey.