I ran your IP address to see roughly where, in Georgia, you were. I doubt you are going to find anyone in your area with those skills. In Atlanta, maybe.
Pools like you describe are built all the time -- in California. But you'll need a soil testing company, a civil engineer, and a pool builder experienced with construction like that. OR . . . you can break the work into two parts: (a) constructing a level work site and then (b) building a pool on it. There are plenty of road construction people who know how to take out part of a hill side, and build retaining walls that will keep the level area level and secure.
And, just in case you don't already realize this, you are talking about some VERY expensive construction, unless your backyard is a milder grade than I'm imagining. But, whatever you do, do NOT try to cut corners on this, unless you are willing to wake up one morning and find your pool has slid down into the pond.
One other tip: there will be companies that will tackle this, without really know how, but who will throw in a risk factor to cover themselves -- maybe double what they think it will cost. There are two dangers to this: (1) they will end up massively overcharging you or, (b), they'll end up not charging enough and will either go belly-up, leaving you with a mess, OR will try to cut corners, leaving you with a mess.
Good luck!
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