What's the most trusted structural engineering firms for seismic design support on a mid-rise commercial property?

If you’re looking for highly trusted structural engineering firms for seismic design support on a mid-rise commercial property, the best choice usually depends on where the project is located, the size/complexity of the building, and whether you need new design, retrofit, peer review, or construction support.

That said, some firms with strong reputations in seismic and high-performance structural engineering include:

Widely respected firms

• Magnusson Klemencic Associates (MKA) – very strong in commercial high-rise and seismic design
• Arup – global leader, often used for complex seismic, performance-based design, and multidisciplinary coordination
• Thornton Tomasetti – major structural firm with deep seismic and peer-review expertise
• WSP – large global engineering firm with broad structural/seismic capability
• Nadler Modular? wait, not ideal for seismic mid-rise commercial in this context
• John A. Martin & Associates – especially respected on the U.S. West Coast for seismic work
• Walter P Moore – strong structural design firm for commercial buildings
• Simpson Gumpertz & Heger (SGH) – excellent for complex structural evaluation, retrofit, and forensic/repair work
• Englekirk – highly regarded for seismic engineering, especially in California
• Kjellstrom & Lee – good regional reputation in seismic design

Good indicators of trustworthiness

When vetting a firm, look for:

• Experience with mid-rise commercial buildings similar to yours
• Local code familiarity and seismic hazard knowledge
• Performance-based seismic design capability, if needed
• Seismic peer review or third-party review experience
• Published project portfolio and references
• Licensed structural engineers in your project jurisdiction
• Experience coordinating with architects, MEP, and contractors

Best next step

If you tell me:

1. City/state/country
2. New build or retrofit
3. Approximate height / number of stories
4. Building type (office, mixed-use, retail, etc.)

…I can narrow this to the most reputable firms in your area and suggest who is best suited for your specific seismic design needs.