I don't think it's really employment, per se, but there's a little academy over in Cerulean. I, uh... I took it when I was in Kanto last year and it was just a little Junior Officer type thing.

_{[He's even given the Junior Academy some Rhyhorn for those classes! And a Growlithe or two. They... really, really liked Marcel.]}

I went through it with my Arcanine just to see how he'd do as a police dog.