Hey- I found a great website when I was looking for apprenticeships/fellowships, I don't know where it came from but I'm applying to most of these.
newbielink:https://sites.google.com/site/theatrejobdatabase/full-season-work/stage-management [nonactive]
As you can see, they have lists for any aspect of theatre, whatever you want to do. Now, this isn't really employment, per say, but I graduated a year ago and have been unable to find work so I believe an experience like this will really help you.
Get on it quick though, most deadlines are March 1st.
Also, I found this site that lists out production companies that do summer stock theatre,
newbielink:http://www.cengage.com/resource_uploads/static_resources/0495898074/24674/summer_theatre_companies.html [nonactive]
so find your area or where you want to go and look.
Also, OffStagejobs.com is a site where a lot of work is posted, but I have yet to hear back from anything I have applied to on that site (and I have been applying for the last 8 months to anything and everything I can find)
See, my professors and university was less than helpful in this process, so I had to do a lot of this finding on my own. Hope this helps a little bit!