Burns & McDonnell serves the St. Louis metropolitan area from two offices: St. Louis and O'Fallon, Ill. More than 140 full-time professionals, all 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.

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.