Recs on landscape contractors for backyard grading

We need basic grading of our brownstone backyard (30′ x 10′) before the winter. We have no plants back there, so this would just entail removal (or adding) of soil and rocks to make it level for better drainage. (The backyard currently slopes towards our house.) Anyone have recommendations for a landscape contractor to do this basic job? I don’t need a landscape designer for this, and the GC’s I’ve spoken to say that this isn’t their area.