I am flying Aer Lingus (330) from Boston to Paris (via Dublin) in May, and had the same concerns.  I am focusing on the overall safety record of AL, which is excellent.  If they use contractors, I am telling myself, I am sure these folks don't want to die any more than I do. 

And thanks, Capt. Tom, for the 330 info.  I had similar concerns, but you have made me feel a lot better.