Phillippi Engineering, Inc. (PEI) is an innovative, cutting-edge civil engineering and land surveying company in Vacaville, Calif. One of the largest firms in Solano County, we use state-of-the-art equipment and are committed to serving our clients with honesty and integrity. Since 1983, PEI has provided premier engineering services to a diverse range of clients across Northern California. Our engineers have... Read More about Phillippi Engineering Inc