TWM Engineering & Geospatial Services

TWM Engineering & Geospatial Services, headquartered in Decatur, Illinois, stands as the 8th largest engineering firm in the St. Louis region. We specialize in providing comprehensive civil and structural engineering and geospatial services to both public and private sector clients across the Midwest and Southeast, including Illinois, Missouri, and Tennessee. Our team of licensed professionals and dedicated support staff leverage their extensive knowledge, skills, and experience to address complex design challenges with precision and cost-effective solutions. Our 78-year legacy of excellence and reliability has earned us a solid reputation, reflected in the impressive retention of approximately 95% of our clients' business.

At TWM, we are committed to delivering Exceptional Service. Nothing Less. This dedication is at the core of our client relationships and drives our approach to every project. We understand the importance of getting the job done right, and our long-standing history in the industry is a testament to our ability to meet and exceed client expectations. Whether it’s through innovative engineering solutions or advanced geospatial services, TWM is devoted to providing the highest quality service, ensuring that our clients' needs are met with accuracy and efficiency.