The Sigma Group
Single Source. Sound Solutions.
Milwaukee, WI
Loading directory…
Find the right engineering partner.
Explore capabilities, project experience, and office locations to build your shortlist.
Halff Associates, Inc.
Purposed For People.
Explore capabilities, project experience, and office locations to build your shortlist.
Single Source. Sound Solutions.
Milwaukee, WI
Purposed For People.
Thousands of Miles. Millions of Subscribers.
Practical Solutions. Designed to Last.
Tualatin, OR
Bridging grace and imagination with functionality while delivering pragmatic solutions.
Buffalo, NY+4
Service. Integrity. Results.
Mercedes, TX
Shaping Our Communities Together
Boston, MA+6
Our Dedication Makes Us The Perfect Choice For Your Project.
Ocala, FL
Engineering, research and development, and environmental services for government and defense sectors
Layton, UT
Designing for the Future of Our Communities
San Antonio, TX+1
Create ahead.
Lansing, MI+1
Water Resources and Stormwater Management.
Rockville, MD+1
Engineering Better Communities
Hobbs, NM
Problem solved.
St. Louis, MO+3
Expert Engineering Services
Excellence in Engineering & Surveying Since 1922
Laredo, TX+2
Architecture, Engineering, and Environmental Services
The Difficult, We Do Right Away. The Impossible, Takes A Little Longer.
St. George, UT
Engineering, Reimagined
Bismarck, ND
Civil engineering and land surveying in Cleveland
Cleveland, OH
Civil & Environmental Engineers
Crawfordsville, IN
Land Planning and Civil Engineering.
San Diego, CA
Your Single Source
South Bend, IN+1
Site Development and Water & Sanitary Sewer.
Plainfield, IN+1