I have a PhD in a similar field to Earth Science and now I'm an engineering team lead at a company in a field related to my PhD. This is the second such role I've held like this and it was very much that I found a perfect position in both cases. I think a key part of being able to combine my domain and technical expertise in a single role was that the jobs were at startups where there's often the need for folks to wear multiple hats. That said, in the past decade since leaving academia I have perhaps seen a handful of such jobs. So, they do exist, but are few and far between, IME.