28 then these also would be sins to be judged, for I would have been unfaithful to God on high.

Read Job 31:28 Using Other Translations

This also were an iniquity to be punished by the judge: for I should have denied the God that is above.
this also would be an iniquity to be punished by the judges, for I would have been false to God above.
If so, I should be punished by the judges, for it would mean I had denied the God of heaven.