At the age of ~35, I'm about to start my fifth academic appointment at the postdoc/staff scientist/research fellow level. The apparent lack of progress, both career and research-wise, has made me want to consider a chance of scenery.
In my present line of work, one picks up a great deal of knowledge about the various things needed to make the lab "tick", ranging from high-tech instruments to utilities, without ever really attaining a professional level of expertise in any particular topic.
Are there any enterprises willing to overlook a lack of formal qualifications for a jack of many trades with a PhD? I believe there are many competent people in the same boat across the various STEM disciplines.