TWM Inc. has established itself as one of the top firms providing engineering and geospatial services to both the public and private sectors. Over the course of 70+ years, we have diversified into five primary disciplines—survey/geospatial, transportation, land development, structures, and water infrastructure. We incorporate state-of-the-art technology to offer the best service available, whether it’s 3D laser scanning, mobile LiDAR, aerial photogrammetry, pavement management, robotic video inspection, or geographic information systems (GIS).

We have the resources of a larger firm and the personalized customer service of a small, family-oriented firm working for local communities. With more than 100 licensed professionals and support staff, our firm is an ideal size—large enough to take on major projects but small enough to respond to your needs quickly. The firm’s ESOP ownership means that every client works with an owner and will benefit from that person’s vested interest in seeing the firm and its clients succeed. Our mission and our promise continues to be Exceptional Service. Nothing Less.

Seven office locations, including Swansea (HDQ), Peoria, Waterloo, and Edwardsville, IL; St. Louis and St. Charles, MO; and Franklin, TN.

33 Licensed Professional Engineers, including 7 Licensed Structural Engineers & 3 Professional Traffic Operations Engineers
11 Engineers in Training
4 Dedicated Construction Inspectors
9 Licensed Land Surveyors
4 Surveyors in Training
19 Simultaneous Survey Crews

9 States in which TWM staff hold engineering licenses: Illinois, Missouri, Tennessee, Arkansas, Colorado, Florida, Indiana, Kentucky, and Texas