Meet Our Team

Geoffrey Zimmerman is a senior advisor and chief compliance officer at San Francisco Bay Area-based wealth management firm Mosaic Financial Partners.

Geoffrey M. Zimmerman (“Geoff”) specializes in assisting with complex issues and decisions faced by corporate executives and other professionals.

Geoff is particularly deft at assisting those preparing for or currently weathering a major life transition, such as retirement. Gap analysis and interacting with clients keep him energized. He excels at asking the right questions, leading clients to think about the right issues.

Geoff sees a parallel between financial planning and practicing medicine: financial planning is our due diligence; in medical terms, financial planning is the diagnosis before writing a prescription.  Furthermore, he says, “If you are a medical practitioner, it is important to know your patient’s current health, medical history, allergies, and awareness of what medications they are currently taking in order to recommend appropriate treatment and avoid adverse drug interactions. Similarly, with financial planning, you need to be aware of the intersection and interaction between the host of areas in a person’s financial life – saving, spending, investing, insurance, taxes, legal documents, etc  to help make sure they are also well coordinated.   A skilled financial planner can help coordinate these elements to work well together and avoid adverse interactions.” 

At the University of California Santa Barbara, Geoff double-majored in economics and mathematics, receiving his BA in 1989. In 1999, while working as an investment consultant for Charles Schwab and Co, Geoff completed UC Berkeley Extension’s Certificate in Financial Planning program with academic distinction, and earned the CFP designation the following year. Shortly thereafter, he was named Schwab’s Regional Financial Planner for the Bay Area, and was highly regarded for his planning knowledge and his work in corporate equity compensation.

In his off hours, Geoff sits on the Planned Giving board of the East Bay Regional Parks Foundation. In the past, Geoff and his wife Lynn have volunteered at the Lafayette Town Hall Theater; their dog Molly was adopted while Geoff served as an adoption counselor for the German Shepherd Rescue of Northern California. Geoff is also an avid hiker and amateur photographer. His photograph of bright, autumnal Yosemite leaves changing midseason graced Mosaic’s 2014 holiday card.


  • Executives
  • Stock Option Strategies
  • People Near Retirement
  • Sudden Wealth


In The News

Investopedia / June 23, 2017

5 Considerations If You Need Earthquake Insurance

Available policies have been updated, and earthquake insurance might be a good option to protect your equity, but how robust a policy do you need, and how do things like your land's soil condition come into play? Geoff outlines 5 angles to think about when it comes to considering earthquake insurance.

Originally published on our newsletter;  our blog boasts a more in-depth version

NerdWallet / November 15, 2016

Paying More Tax Today May Be Your Best AMT Strategy

Geoff explains a strategy to accelerate income to take advantage of the 28% tax rate under the AMT system now, rather than having increased income be exposed later to a rate of 39.6% under the regular system. If your AMT income is more than $494,900 and is below the point where AMT and the ordinary tax rate converge, you can and should look for ways to increase your income.

Syndicated to SF Gate, My San Antonio, The Atlanta Journal Constitution, Palm Beach Daily News, Palm Beach Post, the Austin-American Statesman, WHIO, Journal News, and NewsOK.


NerdWallet / October 20, 2016

Reducing Your Income to Escape the Alternative Minimum Tax

If you got hit by the federal alternative minimum tax - also known as the AMT - last year, or you think you might get hit by it this year, now is the time to think about your tax planning. Geoff outlines several ways to reduce your alternative minimum taxable income to the point where the AMT is less than the ordinary tax; strategies include retirement contributions, incentive stock options, itemized deductions, charitable contributions, and more. 

Syndicated to SF Gate, My San Antonio, The Atlanta Journal Constitution, Palm Beach Daily News,  Palm Beach Post, Austin-American Statesman, WHIO, Journal News, and NewsOK.

Investopedia / September 15, 2016

Selling Employee Stock Purchase Plan Shares

In part two of his ESPP article series for Investopedia, Geoff delves into qualified sales, positing several scenarios, including what to do if the stock price decreases in a qualified sale, and special situations that allow for selling shares as a disqualified sale. 

Investopedia / September 9, 2016

Tax Tips for Employee Stock Purchase Plans

Geoff explains different ways to approach the sale of ESPP shares from a tax-optimized stance in his two-part series for Investopedia on stock option strategies. Syndicated to


Investopedia  / August 24, 2016

Turning Retirement Cash Flow Into Your Own Paycheck

Geoff sees similarities between managing cash flow in retirement and managing water. Your investment portfolio is like the snowpack in the mountains; melted snow flows into a reservoir; the dam attached to the reservoir meters the flow of water. In his first article for Investopedia, Geoff explains how you can go with the flow and create a regular paycheck from your portfolio in retirement. 

Nerdwallet  / May 16, 2016

Navigating the Alternative Minimum Tax

The AMT is an alternative method of calculating federal income tax that runs parallel to the ordinary method. To determine whether you are subject to the AMT, you have to map both routes simultaneously. Whichever route results in the greater tax amount, that’s the one you follow — and that’s the amount you pay. Geoff helps you navigate the rocky road of the AMT.
Also seen on LinkedIn Pulse.


Nerdwallet  / April 25, 2016

2 Portfolio Protection Strategies That Don't Work - And 2 That Do

Geoff weighs the pros and cons of several portfolio protection strategies, with an eye toward long-term results unaffected by emotionally-biased decisions. This article has been syndicated to multiple outlets, including Nasdaq, The Statesman, Palm Beach Post, NewsOK, and the Atlanta Journal Constitution (AJC)

Also seen on LinkedIn Pulse.


Smart Business / September 29, 2013
How executives can plan now for their 2013 taxes


Smart Business / September 16, 2013
Making the Most of Open Enrollment


Senior Advisor and Chief Compliance Officer
Mosaic Financial Partners, Inc
April 2007 – Present
Board Member and Past President 
Estate Planning Council of Diablo Valley
2007 – Present

Past Positions at the Estate Planning Council of Diablo Valley:
President 2014-2015
Vice President and Speaker Chair 2013-2014
Treasurer, 2011-2012, 2012 - 2013
Membership Chair 2010-2011
Director 2009-2010

Financial Planning Association
April 2007 - Present