Keith Thornton

Keith Thornton

Keith brings over 20 years of engineering experience working with major companies across the U.S., combined with decades of hands-on construction and business leadership. After leaving the corporate engineering world, he transitioned into homebuilding—constructing subdivisions, custom homes, and spec homes as a licensed commercial contractor.

Keith successfully navigated the housing market crash by adapting his business model, focusing on quality craftsmanship, smaller-scale projects, and long-term stability. He also holds a real estate license, allowing him to remain directly involved in every phase of the building process.

Today, Keith helps lead U.S. Door Service alongside co-founder Brian Riddle, bringing a practical, detail-driven perspective shaped by engineering precision, real-world construction experience, and a commitment to doing the job right the first time.

Articles by

Keith Thornton

ADA Automatic Door Opener Installation
Commercial Door Repair
Keith Thornton
Keith Thornton
February 11, 2026
ADA Automatic Door Opener Installation & Repair Metro Atlanta, GA
Commercial Door Repair
Keith Thornton
Keith Thornton
January 29, 2026