Investigative Engineering Competitors

Tetra Tech is the leader in water, environment and sustainable infrastructure, providing high-end technical and engineering services for projects worldwide. With more than 25,000 employees working together, Tetra Tech provides clear solutions to complex problems by Leading with Science® to address the entire water cycle, protect and restore the environment, and design sustainable and resilient infrastructure. Tetra Tech est un chef de file mondial dans les domaines de l'eau, de l'environnement et des infrastructures durables, offrant des services techniques et d'ingénierie de qualité supérieure pour des projets à l'échelle mondiale. Grâce à ses 25 000 employés, Tetra Tech propose des solutions optimales aux problèmes les plus complexes en utilisant la science d’abord pour répondre aux besoins en matière de cycle de l'eau, en protection et restauration de l'environnement ainsi qu’en conception d’infrastructures durables et résilientes.

Together with customers, partners and colleagues, we shape a future where people and societies grow and flourish. We do that by co-creating sustainable and beautiful solutions that improve the quality of life for people today and many generations ahead. Our starting point is gaining a deep understanding of our customers, their aspirations and concerns. This is what sets us apart and how we deliver long-term value. Primarily located in Scandinavia, the UK, North America and India, we currently number 6,900 people, who offer our expertise in engineering, architecture, energy and environment.

SmithGroup is an award-winning, multi-national integrated design firm that employs research, data, advanced technologies and design thinking to help clients solve their greatest challenges. Working across 21 locations throughout the U.S., our network of 1,600 experts is committed to excellence in strategy, design and delivery. Across more than 20 design disciplines, we work collaboratively and creatively, sharing ideas and learning from one another. Our integrated design approach blends aesthetics with performance, sustainability, and resiliency to create a better tomorrow—for clients, employees, the community, the environment, and our collective future. Our unique culture and impact on the built environment have received recognition from top-ranking institutions, publications and design authorities the world over. In 2025 and 2026, we were named a Top Workplace in the United States by Energage and USA Today.