There is no way you can "negotiate " for an upgrade with HR in the civil service.. Becos if they ever entertain you, then they must also entertain the rest will do also request the same.. The offer HR extends to a candidate is based on a fixed formulaic system.. There is "NO" negotiation.. Sometimes they will be very frank with you and tell you that they got backup candidates waiting after you.. Even if you don't want, they will gladly take up the job... No need to indulge in wishful thinking.. Look to the private sector if you really think you got what it takes...