Some people do a Ph.D. while working (almost) full time in non-academic industry. This usually involves going part-time, and having buy-in from one's employer, and of course the Ph.D. will take longer and usually not be quite as "deep" as a full time Ph.D. I know at least one person who did this; they were extremely bright and very driven.
This (rare) situation generates challenges at the intersection between academia and the workplace, which I would argue are quite on topic at Academia.SE, for instance:
- Intellectual property issues stemming from working on similar topics at work and in one's Ph.D. project
- Interpersonal issues, e.g., between one's supervisors at work and in academia, possibly complicated by one's work supervisor changing
- "Selling" academia-related travel or other time requirements at work
- ...
Example questions that might benefit from this tag:
- Cancelled PhD Study ended my career plans
- Part time PhD while working, who owns IP?
- Possibly What are the caveats in pursuing a PhD mainly for fun?
- Non-CIFRE Industry PhD in France and Are theses done in industry (French CIFRE) a disadvantage in academia?, and other questions about the CIFRE program in France
- German doctorate (Phd) in industry; Working in a company or University?
I found these by searching for "industry" in the phd tag and winnowing out everything that was about the relevance of an "academic" Ph.D. for industry.
However, we do not have a tag for this situation, which is definitely more specific than phd. Something like phd-while-working or phd-while-in-industry. (Probably better than phd-while-employed, because many full-time Ph.D. students actually are employed by universities, with contracts stipulating teaching or research assistant work that is sometimes hard to disentangle from the research that aims at the Ph.D.)
Do we want such a tag? (Do we already have one that I missed?)