Sales and Parts Associate. Job Overview. American Truck & Trailer Supply. is looking to hire a. Sales and Parts Associate. American Truck and Trailer Supply is a family owned small business with a close knit team environment. For 30 years American Truck & Trailer has been selling, servicing and repairing all types of trailers, and installing towing equipment, vehicle accessories and snow plows. We are looking for a positive, energetic and organiz...