Business Details
50+ Years
experience
Emergency
services
Structural Engineering Excellence Since 1957
William Simpson & Associates has been delivering structural engineering excellence since 1957. Our practice combines technical expertise, creative problem-solving, and long-term client relationships to provide innovative solutions for projects of all scales. With decades of experience and advanced modeling software, we specialize in designing offices, warehouses, commercial parks, custom homes, and waterfront structures while maintaining flexibility and functionality. Our team of highly educated engineers brings specialized knowledge in concrete, steel, wood, and aluminum construction materials. We maintain industry leadership through continuous innovation, having pioneered advancements in slender-wall design and tilt-up construction techniques recognized by ACI and TCA.Our commitment to quality is demonstrated through landmark projects like Dodger Stadium, the Haj Terminal in Saudi Arabia, and seismic retrofitting solutions for critical infrastructure. We provide 24/7 construction support and maintain rigorous quality control across residential, commercial, and industrial sectors. Our legacy of engineering excellence continues through our dedication to client satisfaction and technical proficiency.
Services
Structural Engineering
Seismic Retrofitting
Bridge Design
Marina Structures
Tilt-up Construction
Shoring Systems
Custom Home Design
Commercial Development
Forensic Analysis
Communication Towers
Details
- Year established: 1957
Highlights and features
- We offer 65+ years of structural engineering expertise
- Our team pioneered slender-wall design advancements
- We provide 24/7 construction support services
- Our engineers hold ACI and TCA certifications
- We've completed landmark projects like Dodger Stadium
Associations and certifications
- American Concrete Institute (ACI)
- Tilt-Up Concrete Association (TCA)
Services
Structural Engineering
Our structural engineering services cover complete building systems analysis and design. We specialize in creating code-compliant solutions for new constructions and existing structures. Our engineers utilize advanced modeling software to optimize structural performance while maintaining budget constraints. Clients benefit from our comprehensive approach that integrates architectural vision with structural requirements.
Seismic Retrofitting
We provide seismic retrofitting solutions for commercial and residential buildings. Our engineers assess structural vulnerabilities and implement reinforcement strategies to meet current safety standards. Services include foundation upgrades, shear wall installation, and diaphragm strengthening. Our expertise ensures buildings can withstand seismic activity while maintaining functionality.
Marina Structures
Our marina structure services include seawall design, floating dock systems, and gangway construction. We address unique challenges of coastal environments using corrosion-resistant materials and wave action mitigation techniques. Our solutions ensure long-term durability while meeting marine regulatory requirements for safety and accessibility.
Bridge Design
We specialize in wood and steel bridge design for private and public infrastructure. Our engineers consider load requirements, environmental factors, and maintenance accessibility in each design. Services include foundation analysis, superstructure design, and compliance with transportation safety standards for pedestrian and vehicular bridges.
Tilt-up Construction
Our tilt-up construction expertise delivers cost-effective commercial buildings using precast concrete panels. We optimize panel layouts for structural efficiency and construction speed. Services include connection design, lifting embed analysis, and coordination with contractors to ensure safe and efficient panel erection.
People
Masoud Jafari
Principal Structural Engineer
With over 40 years of experience, Masoud specializes in structural design and management. He has extensive expertise in commercial, industrial, and marine projects, including seismic retrofitting and forensic analysis. He serves as technical expert in complex engineering challenges.
Witold Lawniczak
Lead Engineer
As lead engineer since 2005, Witold supervises structural analysis and design checks. He specializes in multiple construction materials and has completed hundreds of projects using innovative engineering techniques. He ensures technical accuracy across all deliverables.
Ebi Berangi
Draftsmen
Ebi provides architectural drafting support using AutoCAD for structural modeling and drawing preparation. With California project experience since 2023, he serves as technical resource for documentation standards and drawing coordination.
Questions
What structural engineering services do you offer?
We provide comprehensive services including seismic retrofitting, bridge design, marina structures, tilt-up construction, shoring systems, and custom home engineering solutions.
How experienced is your engineering team?
Our team has over 65 years combined experience with specialized expertise in concrete, steel, wood, and aluminum construction materials.
Do you handle both residential and commercial projects?
Yes, we serve both sectors with customized solutions for custom homes, apartment buildings, commercial developments, and industrial facilities.
What construction materials do you work with?
We specialize in concrete, steel, wood, masonry, cold-formed steel, and aluminum structural systems.
Are you available for emergency structural assessments?
Yes, we provide 24/7 emergency services for structural evaluations and urgent repair solutions.
Do you offer international engineering services?
Yes, our experience includes international projects like the Haj Terminal in Saudi Arabia.
