Who We Are. U.S. Trailer Parts & Supply Inc. is a division of Hinton Transportation Investments, Inc. (HTI). HTI is actively seeking hard-working and growth-oriented individuals that are excited to advance their careers. HTI is a family-owned business with values centered around humility, consistency, and passion. With continuous growth and expansion nationwide, the company is eager to add new, talented individuals to the team. Job Description. T...