Can i Sue the Private Background Check Company if they release expunged information and it costs me a Job...Isnt that defamation..

It is possible. If you cannot find a local attorney on Avvo, a good place to look is the website for the National Association of Criminal Defense Lawyers (NACDL.org) Speak to several attorneys and hire the one that makes you feel confident and comfortable. NACDL local members: http://tinyurl.com/8ru8wtv