TWM Ranked Among the Top 10 Largest St. Louis Engineering Firms

April 2020 – Once again, TWM is one of the top 10 ranked engineering firms in St. Louis according to the list released by the St. Louis Business Journal each year.  The Journal ranks TWM at #9, but the list contains a number of large national firms. Counting only firms headquartered locally, TWM places #4.

The business journal bases its rankings on the number of licensed engineers each company employs in the greater St. Louis metropolitan region as of March 1 each year. Headquartered in Swansea, IL, TWM currently has 32 engineers specializing in diverse disciplines and  110 total employees.

We’re still growing strong! Over the past 19 years, TWM has steadily continued to grow and forged its way into the top 10 after first appearing on the list at No. 24 in 2001.

Join us, we have job openings! TWM recently hired a new structural engineer and now has career opportunities for several other positions, including those for experienced engineers, new graduates, and geospatial interests. View all our openings at

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