Although ISTPs are usually highly employable we are prone to wander without direction in our careers and when we get stuck in a rut it tends to be pretty deep...
Let's contribute ideas and brainstorm based on our common job place needs and keep a running list of the best options (that's what MBTI is for originally, no?) which can be a mental springboard for ISTPs to choose their next career. Basically, since we ISTPs have good critical thinking skills, I think we can do a little better than just a "dumb" list of jobs like on job profile websites or similar threads made in the past. Let's approach this intelligently with collective criteria and come up with a smaller yet more effective list rather that rely on a list of 100+ jobs, many of which overlap so much into other personality types that it's largely useless.
If you are an ISTP looking for a job, consider these criteria and provide feedback about how they might apply to your particular interests which might imply a potential career for you. If you're an ISTP with a career already, help me revise these criteria by providing input about aspects of your job you like and dislike relevant to the criteria so we can improve them.
In other words, ISTPs... we can figure out stuff works, right? So let's figure out how we work... and literally, how we work. Considering these things, specific occupations are bound to rise over others.
Basically, we're looking for any job that fit these criteria...
1) The job description changes on a daily basis
2) There is a persistent skill-set which can be mastered over time
3) Work is done in real time, lots of action with little need for theoretical planning
4) Hands-on, "operation" style tasks, and manual dexterity
5) Autonomy with minimal unnecessary structure
1,2,3,4,5) Mechanic (many forms of modern mechanics only do diagnostics with computers and replace parts... might be a dealbreaker)
1,2,3,4,5) Hunting or mountain guide (may be an unrealistic destination for all but the most priveledged individuals)
1,2,3,4) Police Officer or Military Specialist