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

Proudly Serving O'Fallon PROUDLY SERVING O'FALLON

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