• Welcome to Concord, California!

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  • O'Sullivan & Associates

    • Accounting-Certified Public
    2487 Salvio St
    Concord, CA 94520
    (925) 691-6520

    About Us

    Our firm provides outstanding service to our clients because of our dedication to the three underlying principles of professionalism, responsiveness and quality.


    • About

      Our firm provides outstanding service to our clients because of our dedication to the three underlying principles of professionalism, responsiveness and quality.


    • Highlights

    • Whom to Contact

      • Tom O'Sullivan
        Phone: (925) 691-6520