Find the right engineering partner.

Civil Engineering and Project Development and Due Diligence and Entitlements.

Folsom, CA+1

Engineering Confidence Since 1961

Reno, NV

Leaders in structural engineering

St. Louis, MO

Bridge Engineering and New Bridge Design.

Milwaukee, WI+6

American Built With American Pride

Carrollton, TX+1

Structural Engineering Design and Building Information Modeling (BIM).

Charleston, SC

Turnkey industrial, commercial, and mission-critical construction solutions

Logansport, IN+5

Willdan transitions communities to clean energy and a sustainable future

Anaheim, CA+1

3D Modeling, Steel Detailing & Digital Engineering

Tempe, AZ+1

Dedicated to Delivering Sound Engineering Advice

Honolulu, HI

Build On Our Experience

Billings, MT

Building on a Strong Foundation

Tunkhannock, PA

Design. Build. Deliver.

Theodore, AL+4

Empowering Water, Powering Tomorrow

Mendham, NJ

Innovative water treatment and process plants

Our Mission Is Your Mission

Water and Wastewater Engineering and Drinking Water.

Boston, MA

Engineered Comfort. Genuine Performance.

Columbus, OH

Elegant Expertise.

Idaho Falls, ID

Energy efficiency is what we do.

State College, PA+1

It's Relationships We Build

Tulsa, OK

We Make a Difference

Louisville, KY+7

Energy Solutions for the World Ahead

Exeter, NH

Above & Beyond Since 1981

St. Charles, MO