VNY 135 operators who hire often: Air group, Clay Lacy, Elite, Spirit, Trans-exec. Those are the big outfits. On the smaller side, there's also MC aviation, Peterson, Pylon and a couple I won't mention because, well.... you get the idea! At BUR, there's Avjet and TWC. ONT has Guardian Air. Most of these have websites that have an employment page you can access or a way to send a resume. Don't know a thing about SNA. Happy hunting and best of luck.
Charter dog