I worked in a big financial service firm up until LEH went down.  Aug-Oct was the most miserable time of my life.

Afterwards I found a job on Craigslist for a small CPA firm to prepare taxes during the busy season.  The 6 man office was like a family and extremely personable. 

Point is, big companies are not for everyone.  You spend 1/3 of your working years somewhere, you may as well enjoy it.  Call a headhunter or pay someone to cruise job boards for you.