Trusted Forensic Accounting & Litigation Support in San Mateo

When estate and trust matters turn complex, you need more than standard accounting—you need clear, defensible analysis built on decades of specialized expertise. Sullivan CO CPA is a San Mateo-based firm dedicated to providing litigation support, forensic accounting, and estate and trust dispute resolution for attorneys seeking precision and integrity in financial matters. Our team combines deep technical knowledge with a practical understanding of how financial evidence is evaluated in court.

Welcome to Sullivan CO CPA

We offer a full range of tax and business services.

Who We Serve

We partner with estate and trust attorneys, providing reliable support in litigation, valuation, and forensic investigations. Whether the case involves lost profits, tax disputes, or complex business valuations, attorneys depend on our technical accuracy and courtroom-ready expertise. We act as a trusted resource behind the scenes, ensuring attorneys are fully equipped with credible, well-documented financial insights.

Why Attorneys Choose Sullivan CO CPA

  • Led by Brian Sullivan, ABE, CVA, CFE, and AICPA member with decades of valuation and tax experience

  • Proven record of defensible reports for trial, mediation, and settlement

  • Specialized expertise in estate planning disputes, trust accounting, and forensic analysis

  • Reliable litigation support tailored for attorneys who demand excellence

  • Experience across emerging industries including cryptocurrency and cannabis accounting

Our Core Services

  • Forensic Accounting & Litigation Support

  • Estate & Trust Dispute Resolution

  • Business Valuation & Lost Profits Analysis

  • Tax Preparation, Planning & IRS Dispute Assistance

  • Specialized Support in Cryptocurrency & Cannabis Accounting

Your Partner in Forensic Services

Attorneys need a litigation CPA firm they can trust. With recognized credentials including Certified Valuation Analyst (CVA) and Certified Fraud Examiner (CFE), Sullivan CO CPA delivers forensic accounting and tax litigation support that stands up to scrutiny. From estate planning litigation to expert witness testimony, we provide the clarity attorneys need to achieve the best outcomes. Our reports are designed not only to inform but also to withstand cross-examination, giving attorneys every advantage in dispute resolution.

See why our clients love us!

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Don’t struggle with your own taxes any longer – Burlingame based Sullivan CO CPA is here for you. Call us at (650) 548-1120 today to get started.
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Take the Next Step

If you need a forensic tax accountant or expert witness CPA for estate, trust, or business disputes, Sullivan CO CPA is ready to help. Contact us today to discuss how we can support your case with precision, insight, and credibility.

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