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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Exceptional Service. Nothing Less.



TWM continues the important business of supporting our nation’s essential infrastructure in these uncertain times. We are committed to our mission of providing Exceptional Service, Nothing Less to you, our clients and partners. As a professional services firm, the health of our employee-owners and their families is paramount. We are following government directives and public health guidance, implementing work-from-home and other social distancing and hand hygiene practices. We have employed additional technological resources to support our modified operating structure, and we expect to be able to do so with minimal disruption. If you need to visit our offices in person or have trouble reaching your TWM contact, please contact us at 618.624.4488 so we can make arrangements or put you in touch with the appropriate person. Thank you for placing your trust in TWM. Wishing you safety and good health.