TJC and Associates, Inc. (TJCAA), a certified small business enterprise, provides engineering services to Bay Area and Sacramento Area clients, as well as to clients throughout the United States. Founded by Terence Cavanagh, S.E. and Gianna Zappettini as a structural engineering firm in 1998, TJCAA now offers multi-discipline design solutions.

- Structural Engineering - I&C – Electrical Engineering - SCADA Engineering –

- Control Systems Programming -


TJCAA’s head designers, Terence Cavanagh and Paul Giorsetto, were principals and design leaders for an international environmental engineering design firm in California’s Bay Area. Mr. Cavanagh and Mr. Giorsetto together provide over 50 years of experience in delivering creative problem solving for public and commercial/industrial clients. The TJCAA Structural Group provides expertise in the design of water and wastewater treatment plants and seismic evaluation of existing structures, as well as in the design of ozone treatment and chemical containment facilities. Our Instrumentation, Control, and Electrical Group has developed designs for low and medium voltage distribution systems and control systems for complex water treatment facilities both domestically and internationally.

TJCAA and its personnel are responsive and flexible team members. We have demonstrated our ability to provide quality service, both as a lead firm and by integrating effectively with existing design teams. We work toward the best solutions for our clients. TJCAA operates from our fully equipped design offices and is also comfortable operating remotely or on site as part of an existing design team.

“Setting the Standard”