Simmons Engineering

Simmons Engineering is a civil and structural engineering firm based in Concord, CA, serving the San Francisco Bay Area. Since 2010, we have been providing top-notch engineering services to developers, owners, contractors, architects, residential designers, and municipalities. Our focus is on residential and low-rise commercial structural projects, with a specialized expertise in foundation systems on expansive soils.

Our team is dedicated to providing affordable services and cost-effective designs that meet our clients' needs while adhering to the highest standards of engineering excellence. At Simmons Engineering, we believe that better design and stewardship of the earth's abundant resources can lead to "more with less (and for more people)". This belief guides our work and informs our commitment to sustainable and responsible engineering practices.

Our Services

Simmons Engineering offers a wide range of civil and structural engineering services, including:

• Civil Engineering: We provide civil engineering services for water, sewer, and storm drain infrastructure, as well as site development and land use planning. Our team has designed water, sewer, and storm drain infrastructure worth tens of millions of dollars, and we have experience working with municipalities to obtain necessary permits and approvals.
• Structural Engineering: We provide structural engineering services for residential and low-rise commercial buildings, with a specialization in foundation systems on expansive soils. Our team has designed hundreds of specialized foundations, retaining walls, and structural site features, and we have experience working with contractors and architects to ensure that our designs meet their needs and specifications.
• Land Development: We provide land development services, including site planning, permitting, and construction administration. Our team has experience working with municipalities to obtain necessary permits and approvals, and we can help our clients navigate the land development process from start to finish.

At Simmons Engineering, we are committed to providing affordable services and cost-effective designs that meet our clients' needs while adhering to the highest standards of engineering excellence. We believe that better design and stewardship of the earth's abundant resources can lead to "more with less (and for more people)". This belief guides our work and informs our commitment to sustainable and responsible engineering practices.

Our Team

Simmons Engineering is led by Clay Simmons, a civil engineer with degrees in civil engineering and Russian from Brigham Young University. Clay has over two decades of experience in Bay Area civil and structural engineering firms, where he has designed water, sewer, and storm drain infrastructure worth tens of millions of dollars; Sonoma County's first 100% Forest Stewardship Council (FSC)-certified residence; a seismic retrofit and addition to a 40,000 square foot Hyatt hotel; a Silicon Valley multi-family condo building worth over $11 million; and hundreds of specialized foundations, retaining walls, and structural site features.

At Simmons Engineering, we are committed to providing our clients with the highest level of engineering expertise and customer service. Our team is dedicated to meeting our clients' needs and exceeding their expectations, and we are proud to be a trusted partner for all of their engineering needs.