Excellence in Engineering, Integrity in Service
Driven by a commitment to innovation and customer satisfaction, Phillippi Engineering, Inc. (PEI) has been a leading civil engineering and land surveying firm in Vacaville, California, since 1983. Led by experienced professionals, our team thrives on tackling complex projects and delivering exceptional results, building a legacy of impactful infrastructure throughout the region.
Engineering Expertise for Every Project
Our diverse portfolio includes projects of all sizes and complexities, from large-scale residential communities to intricate commercial developments and public infrastructure improvements. We provide comprehensive civil engineering services covering every stage of a project's life cycle, from initial planning and design through construction and completion.
Our services include
- Land Planning and Development: Expertise in site planning, feasibility studies, grading and drainage design, and entitlement processing.
- Transportation Engineering: Design and engineering of roads, streets, sidewalks, and public spaces.
- Stormwater Management: Development and implementation of stormwater control measures to manage runoff and protect the environment.
- Water Resources Engineering: Design and management of water supply, drainage, and wastewater systems.
- Structural Engineering: Professional assistance with structural design and analysis of buildings and infrastructure.
Client-Focused Approach
Client satisfaction lies at the heart of our philosophy. We prioritize open communication, transparency, and collaboration throughout the process. Our team works closely with our clients to understand their unique needs and aspirations, ensuring that their vision is brought to life with precision and efficiency.
We understand the importance of staying within budget and schedule constraints, and we actively seek cost-effective solutions without compromising quality. Our commitment to excellence and attention to detail have earned us the trust of countless clients across the region.
Experience, Innovation, and Local Expertise
With over 40 years of experience serving the Vacaville area, we have a deep understanding of the local regulations, codes, and challenges. Our team stays up-to-date with the latest advancements in technology and engineering practices to deliver innovative and sustainable solutions tailored to each project's unique requirements.
Contact us today to discuss your project and discover how Phillippi Engineering, Inc. can help you achieve your vision.
Design and Engineering Excellence
The reviewers had a consensus that Tom Phillippi and his engineering firm, Phillippi Engineering, delivered outstanding results. The designs and engineering work were praised for their quality, with one reviewer mentioning that despite facing numerous high water events, their project suffered minimal damage. The team's expertise in navigating local, state, and federal codes was also commended.
Professionalism and Community Involvement
The reviewers appreciated Tom's professionalism, noting that he is a great community member and leader. His roles in local community developments, including mediating disputes between businesses and government agencies, were highlighted. The reviewers also praised the company's relationship with the city, with one reviewer mentioning that their intimate understanding of how the city works made the project implementation smoother.
Recommendations and Testimonials
The reviewers unanimously recommended Phillippi Engineering to others, with one reviewer stating that they are "the very best." The team's expertise, combined with their excellent community connections and customer service, made them the go-to choice for development and land issues.

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