Siegfried is one of Northern California’s largest multidisciplinary design and engineering firms, offering civil engineering, structural engineering, geotechnical engineering, landscape architecture, surveying, and partnering services. With offices in Stockton, Sacramento, Modesto, and San Jose, we’re proud to be a trusted partner for clients, employees, and communities alike.
We believe great projects come from great collaboration. Our integrated teams work closely across disciplines, streamlining costs and maximizing function. By seeing each project as a whole—not just individual parts—we solve complex challenges with creativity and technical expertise, shaping vibrant communities and successful businesses.
Our Mission
Creative Solutions That Work
Siegfried’s mission is to provide creative work and solutions, while building a great company that supports its members and gives back to the community.
Innovative Problem-Solving
Every project is approached with fresh thinking and practical creativity, ensuring solutions that are both visionary and effective for our clients.
People-First Culture
We invest in our team’s growth, collaboration, and well-being, creating an environment where talent thrives and ideas flourish.
Community Commitment
From volunteer initiatives to pro bono work, we actively give back, making a lasting impact in the communities we serve.
Our Vision
Siegfried’s vision is to be the firm that delivers the most creative and reliable solutions to create a better tomorrow for our communities.
Creative Excellence
We push the boundaries of design and engineering to deliver innovative, forward-thinking solutions that shape a better future.
Unwavering Reliability
Clients trust us to deliver consistent, high-quality results—on time, on budget, and with integrity.
Community Impact
Every project we take on is an opportunity to enhance the communities we serve, creating lasting value for generations to come.
Our Values
Our values guide everything we do, and together, these values define who we are and how we build a better future.
Relationship
We work as one team. We build relationships of trust. Together we all win.
Performance
We work diligently to deliver consistent high-quality work to each client.
Experience
We bring years of valuable expertise and talent to projects.
Creativity
We bring a unique range of technical creativity and professionalism.
Integrity
We do what is right for the customer. We treat each other with respect. Our work is our signature.
Community
Committed To Our Community
We believe strong communities create a better future. That’s why we actively give back—through donations, volunteer work, and using our engineering expertise to enhance the places where we live and work.
Supporting Local Organizations
We encourage our employees to get involved, offering opportunities during work hours to engage with and support various charitable organizations. Over the years, we’ve partnered with:
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San Joaquin County A+ Literacy Program
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The American Cancer Society
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The American Red Cross
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The American Heart Association
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Stockton Symphony
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United Way, Kiwanis International, and Rotary Club of Stockton
Our team also contributes their time and resources to:
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Blood drives
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Holiday giving programs
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Disaster relief fundraising
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Food bank donations
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Community runs and walks supporting causes like breast cancer research, diabetes, and muscular dystrophy
