As the 9th largest engineering firm in the entire St. Louis region, TWM, Inc. provides Civil, Structural & Rail Engineering, Land Surveying, and other Geospatial Services to both public and private sector clients in Illinois, Missouri, and beyond.

Over the last 74 years, we have diversified into five primary disciplines Structures, Transportation, Land Development, Water Infrastructure, and Surveying/Geospatial. We draw upon the extensive knowledge, skills, and experience of our licensed professionals, as well as our support staff, to consistently deliver cost-effective, innovative, and sensible solutions to the design challenges facing our clients.

Our employees are experienced and focus on solving your problems with accurate and cost-effective solutions. They care deeply about providing exceptional services to you as a client. Due to the solid reputation, we have built for being able to get the job done right, we proudly retain approximately 95% of our clients business.