RSI
Legacy Redefined
Oak Ridge, TN
Explore capabilities, project experience, and office locations to build your shortlist.
Legacy Redefined
Oak Ridge, TN

Your Trusted Civil Engineering Firm for Innovative Solutions
Program Management & Planning and Budgeting & Funding Management.
San Diego, CA+1

Full-service environmental consulting for complex technical and regulatory challenges.
Westbury, NY

Professional. Committed. Reliable.
Armuchee, GA
Redefining Possible

A premier engineering consulting and program management provider.

Solutions for Tomorrow
Newark, NJ+1
Bright ideas. Sustainable change.

Quality Project Solutions
Los Angeles, CA

Containerized, modular wastewater solutions
Milwaukee, WI

Over 30 Years of Engineering Innovation and Excellence
Rochester, NY+5

Surveying and civil engineering consultation in western Wisconsin
Eau Claire, WI+1

Improving the communities we serve
Redding, CA

Listen. Understand. Develop.
Santa Rosa, CA

Innovative Project Management & Engineering Solutions for the Modern World
Denver, CO

Engineering | Environmental | Surveying
Pittston, PA+1

Common sense solutions to solve engineering problems on time and on budget.
Redding, CA
Excellence. Innovation. Service.
Cherry Hill, NJ+13

Environmental Remediation, Emergency Spill Response & Mobile Treatment Systems
Marietta, GA

Slope Stabilization and Recycled Plastic Pin Systems.

Transportation Engineering and Roadway and Bridge Design.
Indianapolis, IN

Serving our clients with integrity and excellence since 1978.
Carson City, NV+1

Restoring communities to resilience.
Bellaire, TX