Jon  WiddowsonJon Widdowson

Silicon Valley

[email protected]


Jon has over 15 years of experience in corporate tax including tax compliance, planning and provision work for Venture backed start-ups. Jon joins SingerLewak from PWC where he was the Director of Taxation for Emerging Company Services in Silicon Valley. His professional experience includes 23 years of successive responsibilities in management for both public and private companies. Prior to that, he worked at two, then Big 6 accounting firms as an auditor. Jon specializes in a full range of corporate tax and accounting matters including FAS 109, FIN 48, FAS 123R, mergers, acquisitions and dissolutions. Jons clients have been primarily Venture start-ups in Technology, including Software, Semiconductor, Computer Peripherals, Green Technology, Internet Commerce, and Life Science Pharma and Device Companies.

Industries & Focus

Technology, Life Sciences

Education & Affiliations

Jon qualified as a Chartered Accountant in England and Wales (FCA) and is licensed as a CPA in New Hampshire. He is a registered tax return preparer in California by the California Tax Education Council and is a member of the American Institute of Certified Public Accountants and California Society of CPAs.