Columbia Headquarters - Mechanical Contracting & HVAC

Columbia, Missouri, is where the QuesTec story began—and where our headquarters remains today. From this location, we have grown into the largest mechanical contracting firm in the mid-Missouri region, providing plumbing, mechanical, and sheet metal systems for commercial and industrial construction projects. Our Columbia headquarters is home to our state-of-the-art prefabrication facility, warehouse operations, and the majority of our project management, estimating, BIM, accounting, and human resources teams. For more than 30 years, QuesTec has been a trusted mechanical partner, delivering quality craftsmanship, innovative solutions, and exceptional service. As we continue to grow, our commitment remains the same: to be Missouri’s most trusted source for commercial and industrial mechanical construction services.