Our Why

Through a shared vision with our clients and team members, we are driven to build better communities through service with integrity and accountability.

The 3 P’s – Purpose / Passion / Principles


TTL has been engineering a better environment for our clients, community, and people since 1964. Our diverse makeup of scientists and engineers work together to serve our communities by providing technical and professional consulting services throughout the United States.


Our passion for problem solving drives our creativity and innovation. Our people are inspired to deliver resilient environments where people work, live, and play. As a collaborative team, we combine our skills and knowledge for the successful delivery of our clients’ projects.


We are driven to do the right thing, while demonstrating character, trust, and leadership. Every investment and decision is made with our clients, our community, and our people in mind. We consider the impact our decisions have on the present and the future.