Cornerstone Structural Engineering Group is a structural engineering firm with locations in both Fresno and San Francisco, California. The firm offers structural engineering services to both public and private sector clients with a history of successful structural engineering projects in both vertical building and civil infrastructure design. Whether we are working as a sub-consultant to an architect, a civil engineer, or as the prime for a client, servant-leadership and a focus on listening to understand the needs of the client and their project goals are at the core of CSEG's design approach and business philosophy.