S3DA Design is a California based Structural & MEP Engineering firm which comprises a passionate group of professional engineers with over 20 years of experience. We operate throughout the state of California but also nationwide. We are licensed in 33 States.
As qualified experts in the commercial, residential, mix-used, educational, healthcare and industrial sector, we do our best in bringing life to every project. We combine creative solutions & years of experience to honor budget constraints while ensuring our clients’ deadlines.
We’ve found our success in an ongoing teamwork environment & by striving to create long-lasting relationship with our clients and business partners. With the help of dynamic & creative solutions we’ve managed to produce successful outcomes.

Structural Engineering - Our culture - s3da design

Our Culture, Core Values and Approach

Integrity, High Standards, Safety Conscious are our key beliefs that drive the firm. We listen to our clients in order to understand their requirements and are responsible to accomplish those needs using open communication. It begins at the conceptual design phase and continues through every phase of the project’s life. Each step of the way, our experienced engineers work to develop practical, creative and safe solutions that exceed our clients engineering needs on budget and ahead of schedule without compromising design or structural integrity. A positive, solution-oriented approach brings a high level of satisfaction and value to our clients.

Our Team

Nader Moavenian - S3DA Design

Nader Moavenian

General Manager
Mathew Parker - S3DA Design

Mathew Parker

Sales Manager
Hossain Ahmadian - S3DA Design

Hossain Ahmadian

Structural Engineer
Susan Torabi

Susan Tora

Marketing Manager
Mike Hawk

Mike Hawk

General Contractor

Our Partner

GCM General Contractor


Impact Modular Leasing


nVisionTEK-LLC BIM


Pacific Gulf Construction


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