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Well this guy answered a question today, however his profile say "I no longer work at Stack Exchange". Did he join again to support Stack Exchange, or is he just a member?
I doubt because still he has a diamond.
This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.
The real question is: Is it important to know if he works for Stack Exchange right now? Is it impossible that he answered a question just like you and I would?