halliburton

KBR specializes in engineering and construction, and is a major contractor for the US Military. It is a former subsidiary of Halliburton, and is the largest non-union construction company in the United States. KBR is the largest US private employer in Iraq with roughly 20,000 employees and 40,000 subcontractors.

Halliburton is a leader in the oil services industry -- i.e. provides engineering and construction services for oil extraction and development. After separating from Kellogg, Brown & Root (KBR) in 2007, it is no longer in the business of providing military logistics support.