Anyone had his/her basement waterproofed recently?

Hi folks. I'm looking for some reputable waterproofers in the SoMD area...have been referred to Mid-Atlantic, B-Dry, and Maryland Waterproofing. Does anyone have experience with any of those companies, or perhaps have another to recommend?

The waterproofing in question is for a basement...there's major water leakage comin' in.

Thanks!

How old is the house. Where is the leak ,wall or floor ? How deep in the ground is the level of the floor?

The house is 15 years old...the leak is coming in at floor level (walls are not wet but are starting to get moldy down towards the bottom due to moisture). In the back of the house, and on the right side, the house is completely underground.

The front of the house is partially underground, and left side is aboveground (but there's no leakage on those two sides).

Also, the basement is finished.