Firm Members

Brigitta Strand, Principal is a graduate of UC Berkeley's business school, and is a CPA with a Master's Degree in Taxation from Golden Gate University. She has worked with businesses, individuals, trusts and estates for over 25 years. She thoroughly enjoys the challenges of our tax system and helping her clients find solutions to the problems they encounter, find ways to implement the interesting ideas they come up with, and plan for the growth of their businesses and their own financial future.

Although tax season does infringe on her favorite sport (skiing), the rest of the year is wide open for traveling and hiking. Gardening on the weekends and attempting to learn to play golf (the greatest game on the planet, according to her husband) fills what is left of her free time.

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Contact: bstrand@strandboycecpas.com


Debra Boyce, Principal has over 25 years of experience focusing on the audit, accounting, and tax needs of small and medium sized businesses and non-profit organizations, entrepreneurs, and high net worth individuals.  She is a licensed CPA in California, and holds a Bachelor’s Degree in Business Administration (Accounting) and a Master’s Degree in Psychology (Organization Development) from Sonoma State University.

Debra has particular expertise and knowledge of the intricacies of accounting for government contracts, and works with government contractors to help them navigate the associated special accounting requirements.  Debra presents workshops on the Federal Acquisition Regulation (FAR) for professional organizations, most recently the Los Angeles Chapter of the American Council of Engineering Companies, and speaks about tax and accounting issues to a variety of professional organizations.

Debra volunteers her time serving on the Audit Committee for Girl Scouts of Northern California, the Accounting Advisory Board of JFK University, and advising a variety of nonprofit Boards in support of low-income housing, cross-cultural communications, and free speech.

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Contact: dboyce@strandboycecpas.com


Kelly O’Shaughnessy, Principal is a graduate of Holy Names University in Oakland, California and holds a Bachelor of Science in Business Management. Kelly is a Certified Public Accountant in the states of California and Texas and is a member of the American Institute of Certified Public Accountants and the California Society of Certified Public Accountants. She has over 23 years of experience working on accounting, auditing, and tax matters of corporations, partnerships, trusts, and individuals. In her free time, Kelly enjoys tennis, running, and cycling.

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Contact: koshaughnessy@strandboycecpas.com


Sandra Mohun earned her Bachelor of Science degree in Business Administration with a concentration in Accounting from California State University, Chico. She started her accounting career working in San Francisco for a regional CPA firm in both the audit and tax departments. Sandy is a licensed CPA with over 10 years of experience working for both regional and local CPA firms. She also worked as an accounting manager for a wholly owned subsidiary of PG&E. In her free time, Sandy enjoys running, hiking, spending time with her family, and wine tasting in the Napa Valley.

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Contact: smohun@strandboycecpas.com


Sue Branagan is the Office Manager and has worked here for over 30 years! In addition to managing the office (and recognizing your voice when you call), Sue specializes in payroll tax compliance, 1099 reporting, and accounting. She helps her clients solve Quicken and bookkeeping issues, and she is a Notary Public. Sue enjoys gardening, crocheting, antiquing and spending time with her two daughters.

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Contact: sbranagan@strandboycecpas.com


Sandi Johnson graduated from UC Davis with a BS degree in Managerial Economics. She also went to Cal State Hayward where she completed the requirements for a BS in Accounting. Sandi earned her CPA license when she was employed for 3 years with John F. Forbes CPAs, a regional firm in San Francisco working in both auditing and tax. She worked as an internal auditor for Hewlett Packard and an accounting manager for EM Systems for a few years after leaving Forbes. After taking time off to raise 3 children, Sandi has been preparing taxes for 7 years and joined Strand Boyce CPAs in 2013. Sandi enjoys spending time with her children, volunteering for John Muir Hospital and the Red Cross Blood Center and sewing and traveling and walking with her husband.

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Contact : sjohnson@strandboycecpas.com


Amy Worster has over 20 years of administrative experience, in a variety of industries, which helps the office run smoothly. When she is in the office, she enjoys answering your calls, working on bookkeeping projects, and getting the tax return packages out the door. When not in the office, she likes being outside enjoying the beautiful Bay Area.

Contact : aworster@strandboycecpas.com


Roxanne Marek started her career at the early age of eight when she voluntarily began calculating the total cost of the J.C. Penny catalog for her mother. Her passion for numbers led her to earn a Bachelor of Arts in Business Economics with an emphasis in Accounting from the University of California, Santa Barbara. She has over a decade of experience in public accounting that includes high net worth individuals, closely held businesses, and non-profit organizations. Roxanne enjoys spending time with her young, rambunctious daughters, traveling with her husband, staying fit with Zumba, reading mystery books, and wine tasting.

Contact : rmarek@strandboycecpas.com

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