Sitter Job in San Diego, California

We have a 5 month old son. I work days and she works nights so we sometimes overlap. We are just looking for a sitter a few times a week for a few hours. I am also in the Navy and have to be gone for a few days at a time so on those nights we would need him watched until she got off usually no later then 12. If you could provide this please let me know. Thank you.