Tax Services
San Ramon, CA
Located in San Ramon, Withum is one of the Bay Area’s top accounting firms, offering advisory, tax and assurance services.
Withum specializes in more than a dozen industries, has one of the largest ERISA practices in the country, advanced forensic capabilities along with outsourced accounting and cyber services. You won’t find a more connected team of passionate professionals serving the San Ramon business community…plus a whole suite of advisory solutions that will level up your success. That’s the Power in the Plus!
(925) 277 9100
San Ramon Service Specializations
Assurance and Accounting
Forensic and Valuation Services
Cybersecurity
Outsourced Accounting Systems and Services
CA State and Local Tax Updates
Do you or your organization operate in multiple states? Do you own property in a variety of states? California State and Local Tax (SALT) laws are always changing and understanding the nuances of the states that you own or operate in is challenging. In these California resources, you’ll find just a dash of the most up-to-date details on rules and regulations as state and local tax changes happen by state!
Industries We Focus on in San Ramon
Beyond the Region
- Inside Public Accounting Top 100 Firms – 23rd Largest Nationally
- Accounting Today Top 100 Firms – 22nd Largest Nationally
- Great Place to Work® – Fortune Best Workplaces for Parents and Women
- Vault Top 25 Accounting Firm
Partner In Charge
Joseph M. Thiermann, CPAJoe is a partner with over 25 years of specialized audit experience with audits of defined contribution plans, defined benefit plans, health and welfare plans, labor organizations and not-for-profits. He conducts system-wide reviews, designs and implements accounting systems and works on special projects involving system design, expense reporting and compliance, often in conjunction with other professionals to resolve regulatory and general management issues for clients.
Joe is an avid public speaker, having presented at the Annual Conference of the International Foundation of Employee Benefit Plans (IFEBP), the IFEBP Accountants’ Institute and the Oregon Labor Law Conference, and even taught business courses to contractors.
San Ramon Leadership
Withum San Ramon in the News
CalCPA Names Withum Leaders to 2026 NorCal Top 50 Accountants
Top 50 Accountant Honorees at Withum Brandon Yip Brandon Yip is a partner who leads Withum’s Technology and Emerging Growth Services Team in the San Francisco Bay Area. He focuses on advising public and private companies on audit, regulatory and transactional matters while helping innovation-driven organizations scale. Deeply connected to Northern California, he supports the region’s technology and life sciences ecosystem…
Driving Connections: SF’s Annual Golf Tournament Tees off With Team and Guests
Withum’s San Francisco office proudly hosted its annual golf tournament on Friday, September 19th, 2025, bringing together colleagues, clients, and friends of the Firm for a day of friendly competition and charitable giving. Held at the Chardonnay Golf Club, the event featured a golf scramble format, followed by a lively reception. The reception was a…
Withum’s San Ramon Office Relocates Within Bishop Ranch Park
Withum secures new office space in San Ramon and invites the community to an open house celebration in Bishop Ranch Park. Withum is proud to announce the relocation of its San Ramon office to a new, state-of-the-art space in the prestigious Bishop Ranch business park, located at 6101 Bollinger Canyon Road, Suite 400. To celebrate…
Withum’s Harman Dhanda Recognized as Next Generation in Accounting by San Francisco Business Times
Withum is proud to announce that the San Francisco Business Times has named Harman Dhanda, CPA, to its quarterly Next Generation in Accounting List. Harman, a Tax Manager with over five years of experience, specializes in tax leadership within the Firm’s sports tech industry and digital assets sector. He has spearheaded innovative tax initiatives, mentored…
Withum Congratulates Anni Chen, CPA, on CalCPA Women to Watch Experienced Leader Award Nomination
Withum is proud to announce that Anni Chen, Audit Manager and CPA, has been nominated for CalCPA’s Experienced Leader Award. For 10 years, Chen has demonstrated exceptional success across several industries, including life sciences, technology and financial services. The CalCPA Women to Watch Awards celebrates the accomplishments of women CPAs who are making a difference…
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