Odds of Hanging On
As far as jobs in schools go, this one has more job security than most of the rank-and-file faculty and staff members. While teachers may be a dime-a-dozen (and often get paid that way), school psychologists are a special niche that aren't easy to replace, like a really great NPC for whom you're willing to forgo the last three hours of unsaved game progress just so you don't lose them to some low-level dungeon rat.
Couple that with the fact that a consistent, unbroken relationship is the best thing for students with learning disabilities, and you'll find yourself in the same office for as long as you're willing to work there. Unless you're really bad at your job, in which case you'll find yourself expelled quicker than most of the children you weren't very good at helping.
So what we're saying is that it's essentially up to you: if you can deal with heavy emotions, upset children and their confused (and often upset) parents, and a likely obtuse School Board that doesn't understand your work, this job will be yours forever. If you wake up one day, stressed out of your mind and itching for a change, there's a whole Shmoop section of other career options waiting for your perusal.