The question was who can help answer the question; not Why is this individual asking for proof.
Why people ask this question directly correlates to how the question should be answered.
I happen to agree with TBT (and those who agreed with TBT).
That having been said, the professionals who deal with this (I’m sorry I have no specific recommendations) deal with it, as chalilavchas said, “with the human touch”.
But thanks to all the CR psychiatrists who understand people and have all the answers.
The Torah commands even a simple 13 year old boy or 12 year old girl to believe in Hashem. It is therefore obvious that anyone who lacks faith is missing something outside of the realm of intellectual proof. See R’ Elchonon Wasserman’s Kovetz Ma’amarim (I think it’s the first one) for a deeper explanation. (There other approaches which differ from R’ Elchonon’s, but my statement is true according to them as well.)