Burns & McDonnell serves the St. Louis metropolitan area from two offices: St. Louis and O'Fallon, Illinois. The employee-owners provide depth of experience with a focus on cost-effective, innovative solutions that make our clients successful.

Listed in the top 10 percent of U.S. engineering firms, Burns & McDonnell-St. Louis has served the metropolitan area's needs since 1989, delivering a wide range of projects from aviation to roads and bridges to cybersecurity, water and wastewater to labs and clean rooms, power generation, defense facilities and air quality improvements. We're proud to be part of the rich engineering history in the region. Download our brochure highlighting the greatest achievements of our industry.

A 100 percent employee-owned firm, Burns & McDonnell fosters a continuity of client service that is a function of our commitment to proactive communication and low staff turnover.

The St. Louis Post-Dispatch recognizes what our employee-owners already knew: Burns & McDonnell is a great place to work! We're proud to rank as the #22 top workplace in the midsize companies category for 2023.

Once again, for 2022, the St. Louis Business Journal ranks Burns & McDonnell as one of the top Healthiest Employers in St. Louis.

Want to know what makes Burns & McDonnell a great place to work? Great Rated!, the organization behind the rankings used by Fortune magazine, shares details about what our people say and do that puts us on the list. Read more