Our Work Speaks

We create solutions our clients can be proud of   
  and that speak for themselves


Our Legacy

At Siegfried, we build legacy and it has made 
 us the name you can trust.


Connect with Us

Our professional staff is ready to start 
 crafting a solution that is tailor made 
 for your project


Siegfried delivers innovative, client-centered solutions in the areas of civil and structural engineering, surveying, planning, landscape architecture, and athletic facility design. Every client has a unique set of needs and every project has its own challenges. For decades, Siegfried has successfully turned these challenges into opportunities for clients by bringing a rare balance of creative insight and technical expertise to every project.

With over 60 years of experience designing thousands of projects, Siegfried creates functional spaces that work for our clients and their communities.

Hands-on Management

Hands-on project management moves the entire process forward efficiently and effortlessly

Regulatory Guidance

Regulatory guidance based on the latest code and agency requirements ensures the satisfaction of all parties, without sacrificing project timelines or budgets

Innovative Design

Innovative design solutions are customized to site and client needs, maximizing functionality and streamlining costs

Advanced Technology

Application of advanced technology ensures accuracy and precision at every stage, preventing costly mistakes and keeping projects on track

Recent Projects

Civil Engineering

With a long history of successful projects extending throughout Northern and Central California, Siegfried understands the unique needs facing our clients. We work closely with architects, design-build firms, and both private and public entities to produce the most appropriate solutions to any civil engineering challenge.

Structural Engineering

When you need sound structures built on solid design, Siegfried delivers. Our expertise in structural design and coordination is based on over 60 years of engineering buildings and related structures. Our clients rely on our ability to balance deadlines and budgets with the design insight required for structural work.


When the stakes are high, both private developers and public agencies turn to us for reliable results the first time. At Siegfried, technology drives these results, whether we’re linking to systems by satellite, to clients across the country, or to team members in the field.


Human needs demand inventive thinking. Siegfried offers planning services that bring each client’s vision to life. With a unique insight into public and private development plans, we know how to handle the technical details that enable a project to move forward successfully.

Landscape Architecture

At Siegfried, we combine the art and science of landscape architecture to create memorable and enduring outdoor spaces. Our designs seamlessly blend softscape and hardscape elements by responding to natural land features that are ultimately user focused and fulfill our client’s vision.

Athletic Facility Design

Campuses and schools from the University to K-12 level are realizing the potential of well-planned athletic facilities. We approach each project systematically, analyzing and understanding long term athletic goals. By balancing construction costs, maintenance requirements, and use, with an experienced understanding of athletic functions, we maximize each site’s potential.