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

Commercial Door Repair
Keith Thornton
January 29, 2026