I got my master degree three years ago, and I used to work in research since, one year in academic, two in industry. I’m an engineer with a big passion for computing problems, math and physics (I’m not as skilled as a good mathmo/physicist would be, but I think my interest on this subjects is above the average of most of the engineers i know).
As far as I’ve seen so far, the PhD in industry is not essential at least for the applications, however sometimes I think it could be useful for career progress. When I got my master I was offered a PhD position, however, at that time I thought it was definitely more important to get practical experience; so I declined the offer. I never regret that choice by the way; I believe my current job (I do research for a private company) is very good both stimulating and challeging.
However, the idea of seriously taking a PhD for non academic reasons sometimes comes out, since I think it could be good in terms of career perspective due to my attitude to my job: I like investigation, experimenting and formalizing my results and of course when I can publish them, but I’m not interested in an academic career at all.
I wonder how I could plan to get a PhD while keeping my job and what are common techniques to do that?