We create solutions that build stronger communities. Since 1968, NTH has been a critical part of the infrastructure engineering and environmental services that strengthen our communities and protect our ecosystem. Our work not only extends the life of the infrastructure we rely on in our daily lives, but it also protects the natural resources that sustain us. While many of the challenges we face today are complex, our talents shine brightest when solving these multifaceted problems, creating a lasting legacy for generations to come. We love what we do, and it shows. We not only bring broad expertise and deep knowledge to every project, we approach our work with a passion and enthusiasm. We hold ourselves to a higher standard, inspired by the tangible, positive impact we have on the communities we serve. To ensure projects progress smoothly, we put expert level professionals on every job which translates into better outcomes and more creative engineering solutions. Our employees are our critical infrastructure. We are proud to be a 100% employee-owned firm, a distinction that drives our culture and our commitment to excellence. As an ESOP (Employee Stock Ownership Plan) company, every employee has a stake in our success, fostering a strong sense of accountability, collaboration, and pride in the work we do. Being employee-owned means we are invested—not just in our projects, but in each other and in the communities we serve. Our team of engineers, scientists, researchers, geologists, hydrogeologists and other professionals ensures our firm functions with creativity and commitment. And because we seek out the strongest talent, our work is efficient, innovative, and enduring.