Government & Commercial Shipping Services AAT Carriers is one of largest nationwide carriers of hazardous materials. We provide dedicated service for a diverse group of government and commercial customers. AAT Carriers handles all types of van, flatbed, and specialized freight. We have built our business around quick response times and guaranteed service. AAT Carriers is a Department of Defense approved transportation provider. In addition to the DOD, our drivers routinely handle freight for many of the nation’s largest agencies and contractors. Our strong reputation as a safety oriented and customer service focused company continues to drive our growth on the government side. AAT Carriers continues to expand our service offerings for our commercial customers. We currently handle dedicated and ad hoc freight for wide range of industries.