TWM is one of the top 10 ranked largest engineering firms in St. Louis according to THE LIST released by the St. Louis Business Journal each year.  The Journal ranks TWM at #8 among 25, which includes a number of large national firms. The business journal bases its rankings on the number of local licensed engineers each company employs in the greater St. Louis metropolitan region each year.

Over the past 23 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. Headquartered in Swansea, IL, TWM currently has 36 engineers specializing in diverse disciplines and 160 total employees.

77 years and still going strong!

Celebrating 77 years in business, TWM continues to grow exponentially, exploring new expansion opportunities and continuing to deliver on our mission of Exceptional Service. Nothing Less. Together, as one team, we continue our commitment to our clients, people, and communities – all of whom have made TWM what it is today.

Join Our Team
We have job openings! TWM has career opportunities for several positions, including those for experienced engineers, new graduates, and geospatial interests. View all our openings on our Careers page.

Learn more about TWM.