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About Us


For years, Galligan, Thompson & Flocas LLP has been providing quality, personalized financial guidance to local individuals and businesses. Galligan, Thompson & Flocas LLP's expertise ranges from basic tax management and accounting services to more in-depth services such as audits, financial statements, and financial planning.

Galligan, Thompson & Flocas LLP is one of the leading firms in and throughout San Mateo. By combining our expertise, experience and the team mentality of our staff, we assure that every client receives the close analysis and attention they deserve. Our dedication to high standards, hiring of seasoned tax professionals, and work ethic is the reason our client base returns year after year.

Our Mission

Our mission is to help clients maintain financial viability in the present, while taking a proactive approach to achieve future goals. This requires open communication to reach an understanding of our clients' needs through research and sound analysis. Galligan, Thompson & Flocas LLP is dedicated to meeting these goals with high standards of excellence and professionalism. We have been a staple of San Mateo's business community for years, and pride ourselves on the level of esteem we have earned.

Our dedication to hard work has earned the respect of the business and financial community in and around San Mateo. We believe this to be a direct derivative of our talent and responsiveness to our client base. Whether you are a current or prospective client, rest assured that individuals and businesses who choose Galligan, Thompson & Flocas LLP receive competent and timely advice.

Our Team

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Joseph Galligan

Certified Public Accountant (CPA)

Born, raised, and currently lives in Burlingame, CA.

Graduate of Bellarmine High School.
Bachelor of Accountancy from the College of Santa Fe, New Mexico.
Master of Science in Taxation from Golden Gate University.

President of Galligan Thompson and Flocas, LLP CPA.'s which started in August of 1980 located in San Mateo, CA. Specializes in all aspects of tax planning, business valuation, litigation and return preparation, including retirement planning for individuals and business planning for small to medium size companies.

Mayor of the City of Burlingame for two years and Council Member from 1997-2005.

Member of the Board of Directors of Mission Hospice, Inc. of San Mateo County from 1989 to 1997 and President of Board of Directors in 1991 and 1992.

Member of the California Society of Certified Public Accountants. Served on the Board of Directors or as an officer for four (4) years.

Member of the American Institute of Certified Public Accountants.

Founding Director of the San Mateo County National Bank.

Former member of the Board of Directors of Peninsula Bank of Commerce and former Director of Mid-Peninsula Bank.

President of the California Golf Club in South San Francisco in 1992.

Member of the Peninsula Estate Planning Council.

President of Burlingame Rotary, 1993-1994.

Current Director of SkyPark Airport Parking Services, Inc.

Member of the Budget Advisory Council for San Mateo Union High School District.

Member and current Treasurer of Community Gatepath.

Member and current Treasurer of the San Mateo County Legal Aid Society.

Member and head of Budget and Finance of Mercy High School - Burlingame.

Michael G. Thompson

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Certified Public Accountant (CPA), Personal Financial Specialist (PFS),

Mission Statement:

To be a quality provider of comprehensive wealth management services and financial planning to:
Closely - held businesses
High net worth individuals
Service businesses
Retirees / Pre-retirees
We help individuals reach their financial goals and attain financial independence. Our goal is to help our
clients get a good night's sleep and not worry about their financial future.


Bachelor of Arts, Economics, 1973
University of California, Davis
Masters of Business Administration, 1976
University of Southern California


2005 - Present

2004 - Present

1984 - 2004

1981 - 1984

1977 - 1981

1st Global Advisors, Inc. - Investment Adviser Representative
1st Global Capital Corp. - Registered Representative

Galligan, Thompson & Flocas, LLP - Partner

Galligan & Company, CPAs, A Prof. Corp. - Owner

Harb, Levy & Weiland, CPAs

Donald Seiler & Co., CPAs


Certified Public Accountant
Series 7 & 66 (registered with 1st Global Capital Corp./1st Global Advisors, Inc.)
Insurance Life Agent - California Insurance License Number 0D13637


Member, American Institute of Certified Public Accountants
Member, California Society of Certified Public Accountants
Former Board Member, Millbrae Chamber of Commerce
Former Member, State Committee on Personal Financial Planning, California Society of CPAs
Former Chair, Personal Financial Planning Committee, Peninsula Chapter, California Society of CPAs
Our Lady of Angels - Former Member of the Parish Finance Council
Our Lady of Angels - Former Member of the School Board
Former Member of Committee to Select Chief Business Official for San Mateo Union High School District, 1998 & 1999

Securities offered through Securities America, Inc, Member FINRA , SIPC . Advisory services offered through Securities America Advisors, Inc. GTF Financial Advisors, LLC., Galligan, Thompson & Flocas, LLP and Securities America are separate entities. Tax services offered through Galligan, Thompson & Flocas, LLP. CA Insurance Lic. #0D13637 "This site is published for residents of the United States and is for informational purposes only and does not constitute an offer to sell or a solicitation of an offer to buy any security or product that may be referenced herein. Persons mentioned on this website may only offer services and transact business and/or respond to inquiries in states or jurisdictions in which they have been properly registered or are exempt from registration. Not all products and services referenced on this site are available in every state, jurisdiction or from every person listed." The OSJ Branch Manager's FINRA registered branch office is 1110 Iron Point Rd # 160 Folsom, CA 95630

Alex Flocas

Certified Public Accountant


B.S. in Accounting, University of San Francisco, 1986.
G.P.A. 3.54, graduated Cum Laude.


Partner. 1990 to Present
Galligan & Co., CPA’s, San Mateo, California

Specialize in all aspects of tax planning, and tax return preparation, including retirement planning for individuals and business planning for small to medium size companies. Network administrator for the firm.

Auditor. 1987 to 1990

Price Waterhouse, San Francisco, California

Audited companies in a wide variety of industries including retail, real estate, oil and gas, and insurance.
Performed individual income tax returns.


Certified as Certified Public Accountant on May 12, 1990
Member, American Institute of Certified Public Accountants
Member, California Society of Certified Public Accountants
Board Member of Mission Hospice in San Mateo
State licensed real estate salesperson
State licensed agent and mortgage specialist (650)349-1040