My reason for asking the question is two-fold: some badly needed reassurance that I have not rolled myself into a hole (I think it was a design flaw that we cannot re-roll characters in real life) and getting a broader perspective on potential places to keep in mind - in terms of extra-curricular skills that I need to gather along the way.
You haven't mentioned any software skills. I would recommend develop whatever skills you have in that area. The ability to program is becoming as important as literacy and numeracy. Even more so for a mathematician.
My bias is that I have a PhD in math and have been a software engineer for the last 10+ years. I have worked in a lot of different areas and that has largely been because of the combination of math and software (and luck).
I didn't mention programming because I don't see myself being a developer, which I knew would get a lot of attention. I like solving problems with programming, but I don't see myself writing a webapp to collect information for someone to steal.
Computer Science is my secret lover. I initially studied that, but my university focused on producing java devs for industry and didn't do the "science" of computer science. I still work through books when I have time though. About half-way with TAOCP V1.
As for places to look, there's lots of stuff going on in the web and general computing sectors which are now making use of machine learning tools and hiring teams of data scientists. There's also quantitative biology (pharmacology), climate science, etc. disciplines, but many of them want applicants who have a PhD.
If things don't seem "mathy" enough, it's because a lot of the true math jobs and research requires a graduate degree in a math-related field. Doesn't need to be a Math/Applied Math PhD, but even CS, Physics, Climatology, Systems Biology, etc. programs set you up for a math-based career. Without trying to be demeaning, math is a very vertical discipline and the issue is that undergraduate math is really just the basic competences and most of the interesting stuff comes after, which is why many things require a lot more than a BS.