I want to find out who exactly has the contracts (what companies) for Iraq , for the oil and for the reconstruction and the entire commercial sector . Can anyone help me out , does anyone know a nice site that has arranged these things ?

Thanks

Bechtel and Halliburton have the main ones (well, Kelogg Brown & Root - Halliburton subsidiary), but the US Army Corps of Engineers is about to launch a new contract to replace the KBR one. Check out their website for more contract info:

Iraq operations and contracting (http://www.hq.usace.army.mil/cepa/iraq/contracts.htm)