Does it need to be a job? If not, you can build your own low orbit satellites, scale rockets, satellites communications, aquatic robotics and more. In fact, aquatic robotics are one of the most approachable ones because you can do it in a nearby lake/river/beach and do proper science. Plus you can team up with local scientists and help them gather/process data.
Even building a cube-sat that never leaves your desk would be an interesting hobby project, really. Non-experts would certainly learn a ton from doing so, and you'd end up with a cool conversation piece, if nothing else.
