Do you mean school psychology or educational psychology?
I believe CA is the only state the licenses educational psychologists.
Most people with PhD's or master's in Ed Psych either work as consults for school systems, teach at the college or community college level, or most do research in the private sector.
If you look at different research companies or areas--I know ICF is one, the research triangle is another, child trends is yet another--the job potential is there. There are tons of research companies looking for people trained in educational psychology.
As far as job earnings I'm not sure though.