PO Box 1378
4221 Howard Circle
Diamond Springs, CA 95619


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About Us

Sierra Business Service is a full service, family run tax preparation and bookkeeping firm. We are committed to providing close, personal attention to our clients, whom we view as extended family. We take pride in giving you personal assistance that comes from years of advanced training and technical experience.

George "Bill" Marquardt, EA:  
Bill's background in law enforcement serves him well as he navigates complex tax codes and accounting issues. He can often be overheard asking his clients "Did you back it up?".


©Sierra Business Service, 2009 -- all rights reserved