Terracon is an employee-owned engineering consulting firm with more than 3,500 employees providing geotechnical, environmental, construction materials, and facilities services in 140 offices and 40 states nationwide. Since 1965, Terracon has grown from a small Midwest firm to a large, multifaceted national firm. We provide value to our clients through the key benefits of responsiveness, reliability, and resourcefulness. Terracon currently ranks 35th on Engineering News-Record’s List of Top 500 Design Firms.