Locations | United States
O’Fallon, Illinois
Supporting Communities With Engineering and Construction Solutions
Just as O’Fallon itself is an integral part of metropolitan St. Louis, the Burns & McDonnell office in O’Fallon is an integral part of our engineering presence in the St. Louis area and throughout downstate Illinois. From healthcare and laboratory facilities to aviation, infrastructure, environmental, construction and construction management, Burns & McDonnell-O’Fallon employee-owners are proud to serve their communities' needs.
Honors
2025
#4
Best Places to Work in Illinois
Daily Herald
2026
Healthiest Employers of Illinois
HealthiestEmployers.com