Tim Sines, CPA

Sines & Associates
(301) 663-1964


Tim Sines is a unicorn. He is a 30 year practicing CPA and a world-class software developer, a truly unique combination. Tim has run his firm Sines and Associates since 1988  and simultaneously developed three different Practice Management platforms. For the past six years, he has been developing his magnum opus, Mango Billing. He has taken his 30 years of experience as a CPA, understanding of the problems firms face, a deep understanding of software development, and the most modern technical architecture to create the Accounting industry’s most comprehensive solution.

About Us:

Sines & Associates was established as a full service CPA firm to serve the tax, accounting and consulting needs of individuals and small businesses in the Frederick area. We strive to strike the perfect balance between small, local, attentive service and professional experience and expertise.

We believe that listening is the foundation of a lasting client relationship built on trust and respect. Our goal is to provide financial leadership, guidance and advice that you can rely on to help you grow your business and become more successful.

Archived Webinars Offered


Date RecordedOctober 18, 2021  CostFREE  Course Length1.0 hour  Subject AreaComputer Software and Applications  Course LevelBasic  Instructional MethodGroup Internet Based  PrerequisitesNone  Advanced PreparationNone     Who should attend?CPA - small firm, CPA - medium firm, Other