Can anyone suggest me a good logistic bpo service provider in USA?

I am searching for a good logistics bpo service provider in the USA who can manage cargo tracking services efficiently and we can also keep a track side by side. I have heard about Info-X in New Jersey. They are providing me what I want for ocean cargo tracking. If anyone have much better option then please do suggest here.

Here I am suggesting top 5 BPO service provider in USA-

Accenture
Infosys
Go4Customer-US
Wipro Technologies
CSC (Computer Sciences Corporation)

Fusion BPO
Synergy Transcription Services
Vee Technologies USA
Go4Customer
DRN Definite Solutions