DISCLAIMER: THIS DOES NOT CONSTITUTE LEGAL ADVICE NOR DOES IT CREATE AN ATTORNEY-CLIENT RELATIONSHIP
I understand you are upset about the situation and that you believe taking legal action may be your only option here. But, I'd like to you think more practically about this for a moment. Is there a way that you can avoid a lawsuit here? Have you attempted to discuss this issue with the facilities manager at GE? Perhaps you can write him a letter and request that he stop making such statements. What does your current boss say about the situation? My point is that you do not necessarily need to go the legal route.
However, if this is impacting your professional reputation (especially if you lose your current job) you should consult an experienced defamation attorney in your area. It appears that you may have a case.
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