please provide a little information about the scope of your project.

I don't know if Cummings GA is near you but if it is I would highly recommend Lee Anne White : http://www.leeannewhite.com/gardens/
She has an amazing eye for detail, has wonderful follow-through, is a joy to work with, and is multi-talented.

She comes with distinguished credentials having been the editor for Fine Gardeneing Magazine and the editor / writer/ designer/ photographer for a dozen garden and garden related books by Taunton Press.

She is highly respected by her professional peers in the landscape architectural, design and photography fields.

A real pro to work with.

I live in Smyrna and have recently used North Georgia Retaining Walls for our hardscape. I would highly recommend them. Honest and great work ethic. They built three retaining walls, stairs and a fire pit for our back yard. I believe they have a landscaping team as well but we havent gotten to that stage yet.

Here is a link that might be useful: North Georgia Retaining Walls