15250 Ventura Boulevard Penthouse 1220, Sherman Oaks, CA 91403

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.”