Kimley-Horn is a full-service planning, engineering, and engagement consulting firm providing services to both public and private sector clients nationwide. Since our founding in 1967, we have grown from a small group of transportation planners and traffic engineers to a firm with more than 10,000 across 160 offices nationwide, including 17 in California.

Today, we are one of the highest-ranked planning and engineering consulting firms in the US. According to Engineering News-Record, we ranked 8th overall among the nation’s top 500 design firms in 2025. Our success is a result of our steadfast commitment to providing responsive client service, pursuing continuous quality improvement, and operating as a business-based practice.

Our professionals understand that each project brings unique challenges and conditions, and requires solutions unique to each community we serve. Combining national experience with a local sensibility, we provide comprehensive engineering, planning, and environmental consulting services. We work extensively with our internal partners and clients to create the appropriate technical approach for a specific project and provide a clear, concise scope of work. We offer clients the local knowledge and responsiveness of a small organization, backed by the depth of resources only a national firm can offer.