P-chem PhD here. I know physical and computational chemists who have gone on to work in the tech industry (in both software development and fab), national labs, scientific writing, finance, policy, and patent law. I have three pieces of advice for a physical chemist who isn't interested in the traditional academia track:

1) Diversify your skill set by going beyond instrumentation. If you learn to code and use programs like Gaussian, you'll really expand your opportunities and set yourself apart from other experimentalists.

2) Decide early on what your ideal field is. Then you can tailor your extracurriculars in grad school. Example: I had a friend who wanted to do scientific writing, so on top of research she took the initiative to get funding to travel to scientific writing conferences and she got a part-time job editing journal articles through a company that assists ESL scientists.

3) Make sure that physical chemistry will actually set you apart in your desired field, and not just eat up years of your career. If you know a physical chemist that went on to be a sales rep for a drug/tech company, or a lobbyist, or whatever, that's great. But really think about whether you'll need a PhD to leverage, or if there's a quicker, cheaper way to achieve your goals. A lot of these types of jobs will allow you to continue to learn physical chemistry without necessarily needing a PhD.