
The Sigma Group
Single Source. Sound Solutions.
Milwaukee, WI
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Single Source. Sound Solutions.
Milwaukee, WI

We are Doucet.

Providing world-class engineering, program management, and construction services for major infrastructure projects.
New York, NY+3

Quality, Safety, and Experience
St. Louis, MO+1

Engineering & Land Surveying Serving the Hudson Valley Since 1956
Kingston, NY

Building people. Elevating communities. Engineering solutions.
Washington, DC

Design. Build. Operate.
Grand Rapids, MI+10

Efficient Management in Infrastructure Construction
San Francisco, CA+1

One Vision. One Team. One Call.
Topeka, KS+6

Licensed, experienced, and local - providing trusted surveying and engineering solutions in Northern California's heartland.
Chico, CA
Wastewater Engineering and Septic system design, permitting, and inspections (new and as-built).
Kailua-Kona, HI

Juneau - Where Experience Matters
Granite City, IL+2
Elevating the Engineering Experience for our Clients, Colleagues, and Communities.
Miami, FL+1

Our Most Powerful Solution is Trust
Columbus, OH+1

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

Geotechnical Engineering and Subsurface Explorations.
Greenfield, IN

Engineering Services Tailored to Meet Your Needs
Tifton, GA

Moving Forward Together
Pottstown, PA
Engineering and Consulting Since 1974
Wall, NJ

Civil Engineering and Water / Wastewater.
Eureka, CA+6

Proper Execution with Precision
Miamisburg, OH

Structural & Forensic Engineers
Honolulu, HI

Shaping the Midwest Since 1992
Schaumburg, IL+1

Construction Inspection and Coatings Inspection.
Cleveland, OH