Get to Know Me

Sam Greenbaum is a Partner with over 11 years of experience in public accounting, focusing primarily on advising businesses in the technology and emerging growth sector. She is the E-Commerce Services Team Leader, which focuses on providing compliance and business strategy for companies with online B2C and B2B business models. She provides tax consulting on a wide variety of related tax issues, including diligence-ready assessment, secondary transactions, qualified small business stock and state sales tax and international taxes. Sam also specializes in private and publicly held multistate and multinational companies, as well as ASC 740 Tax Provisions and Corporate Tax Compliance.

As a member of the Firm’s Women’s Health & Wellness Practice, Sam is passionate about assisting businesses that focus on women’s health to ensure women are well-equipped with the tools and technology they need to lead healthy lifestyles.

Let’s get started with a conversation today.

Contact Me

Give Back

Sam is a dedicated mentor and passionate about helping women grow their careers and succeed in the profession. She is a founding member of Withum’s Parents Network which supports caregivers throughout the firm. Sam is also a teaching fellow, ensuring Withum’s tax professionals are up to date on current tax regulations and Firm processes.

Work Hard/Play Hard

As a working mom, Sam enjoys spending time with her family when she isn’t at the office. She loves golden retrievers, cooking and enjoying new food and books, and staying active.

Latest Thinking

2026 deadlines
Year-End Tax Planning for Technology Companies: Key Dates You Should Know

As tech companies enter a new tax year, planning ahead for filing deadlines is essential, especially for those managing equity compensation, multi-state operations and rapid expansion. Withum’s Technology and Emerging […]

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online payment, payment successful
AI at the Checkout: How ChatGPT Instant Checkout Is Reshaping Shopping and Payments

OpenAI has just taken a bold step into the future of online shopping with the launch of Instant Checkout, a new feature that allows users to purchase products directly through […]

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new york budget
New York State Incentive Programs

If you operate your business in New York, there are tons of programs and incentives that can help you earn income savings, tax deductions and other business-related benefits. We have […]

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