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Hiring managers, more than ever before, has become a challenge,requiring the finest person with potential and adaptability and not merely experience in his/her field, comment.
"Hiring managers, more than ever before, has become a challenge,requiring the finest person with potential and adaptability and not merely experience in his/her field."
I am not sure if this is what you are after? But I would rewrite the text this way:
"Hiring managers, more than ever before, has become a challenge requiring candidates with potential and adaptability, not merely experience in the field."
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