I left the field full-time and am now a regional EMS Educator.
I'm in an M.Ed program, running a rural EMS education initiative, a mobile simulation program, overseeing a HazMat ALS unit, speaking at multiple national conferences, and doing a fair amount of project work as a consultant. I just signed an agreement to teach a series of courses that will net out around 25k to each instructor this year. And that's a part-time side hustle. Life outside of the ambulance has never been richer or more fulfilling. Money, benefits, and opportunity are far greater than anything a single EMS agency could provide.
The biggest mistake I see with a job like this is when medics think, "I don't want to work in the field anymore, so I'll be an educator..." Horrible decision. I became a paramedic a dozen years ago with the intent of moving to education at a regional or state level. The fieldwork, while utterly enjoyable was the means to the end. This type of position isn't a fallback, it has to be a goal that's fueled by professional development the whole way.
Education and relationships are key. Promise what you know you can deliver, then over-deliver on the promise. Followthrough and customer service are so notoriously bad these days, that you will quickly rise to the top of your area of expertise if you can actually deliver on what you say, in a timely manner, and on budget.
I am frequently approached to take on new projects and receive a call from a recruiter at least once a month. There are lucrative opportunities for well-connected, respected EMS professionals. However, It takes time to cultivate your brand and have your experience vetted. It was a long, involved process to get where I am.