About Anna

Anna Mazisyuk is our creative owner and founder with over 20 years of accounting and management experience.

According to Anna, “Accounting is a window into the health of your business. It shouldn’t be a place of confusion and frustration. The time that you spend on accounting should be limited to analyzing complete and understandable data.”

Anna holds a degree in Finance with an emphasis in Accounting and Marketing, with honors, has been using QuickBooks since 1996, and is a certified QuickBooks Pro Advisor.  She is certified by many other applications as well, including AccountingSuite, Hubdoc, TSheets, Smart Vault, Bill.com, Float, and more.

A controller by nature, Anna jumps on every opportunity to organize and streamline operations. She is a planner, problem solver, and anxiety-buster who’s always learning, evolving and seeking process-improvements.

Prior to founding One Source Services, Inc., Anna was the private CFO to a successful entrepreneur for 15 years.

Her background in retail and wholesale distribution, e-commerce, fraud detection and prevention, and credit card processing has served her bookkeeping & accounting clients well.

The professionals at Sherman Oaks Accounting & Bookkeeping powered by One Source Services, Inc. strive to deliver peace of mind through trustworthy, high-quality bookkeeping & accounting. They work behind-the-scenes to make finances as straightforward and easy to understand as possible, while clients enjoy the benefits of having a designated professional as their main point of contact.

Anna explained, “My motivation comes from seeing the relief and success of my clients as they transition from a land of shoebox receipts and catching-up to a place of clarity, comprehension, and peace of mind.”