10 Withum tax partners
Tax Partner and Partner are the current titles held by these Withum tax partners, whose own practices range from investment funds and digital assets to sports and private clients in US offices. A reader can learn how tax partners work at Withum from people who have held the role.
Professionals to explore
Amanda McKenna, CPA
LinkedInExperience: Tax Partner · Withum
Amanda McKenna has been Tax Partner at Withum since July 2023, based in the New York City Metropolitan Area, and the profile describes leading Withum's Financial Services Tax practice. Amanda McKenna was Tax Principal at Withum from 2019 to 2023, Tax Manager at KPMG US from 2014 to 2019 and Tax Manager at Rothstein Kass (Acquired by KPMG) from 2009 to 2014.
Ed Leitinger
LinkedInExperience: Tax Partner · Withum
Ed Leitinger has been Tax Partner at Withum since July 2025, based in Boston, Massachusetts, and was Tax Principal at Withum from 2023 to 2025. Ed Leitinger was also Senior Tax Manager at EisnerAmper from 2021 to 2022, Senior Tax Manager at Deloitte from 2015 to 2021 and Tax Manager at KPMG from 2014 to 2015.
Emily Smikal, CPA
LinkedInExperience: Partner · Withum
Emily Smikal has been Partner at Withum since June 2025, based in Houston, Texas, with a profile headline naming service to high-net-worth families and not-for-profit organizations as a Tax Partner at Withum. Emily Smikal was Tax Director at PKF Texas from 2021 to 2025, Tax Senior Manager there from 2018 to 2020 and Tax Manager there from 2014 to 2017.
Jim Streets
LinkedInExperience: Tax Partner · Withum
Jim Streets has been Tax Partner at Withum since June 2025, based in Houston, Texas, and was Tax Director at PKF Texas from 2008 to 2025 and Principal - Tax at UHY Advisors from 1992 to 2008. The profile describes tax and business consultation for privately owned companies in manufacturing, professional services, retail, wholesale and distribution industries.
Joshua Horowitz, CPA, MBA
LinkedInExperience: Tax Partner · Withum
Joshua Horowitz has been Tax Partner at Withum since July 2024, based in New York, New York, with a profile headline of Tax Partner and Team Leader of Professional Sports at Withum. Joshua Horowitz was Senior Tax Manager in Sports, Entertainment, and Theatre at Withum from 2011 to 2024.
Joshua Pagano, CPA
LinkedInExperience: Tax Partner · Withum
Joshua Pagano has been Tax Partner at Withum since July 2024, based in the Charleston, South Carolina Metropolitan Area, with a profile headline of Tax Partner at Withum, Digital Assets Leader, SouthEast Leader. Joshua Pagano was Tax Manager at KPMG from 2017 to 2019 and Senior Tax Accountant at KPMG from 2012 to 2019.
Kerra Diener
LinkedInExperience: Tax Partner · Withum
Kerra Diener has been Tax Partner at Withum since July 2024, based in Los Angeles, California, and was Senior Tax Manager at Withum from 2022 to 2024. Kerra Diener was also Senior Tax Manager at Martini Partners, CPAs from 2018 to 2022 and Tax Manager at Crowe from 2011 to 2017, and the profile describes providing tax planning and compliance services.
Laura Smith, CPA, MST
LinkedInExperience: Tax Partner · Withum
Laura Smith has been Tax Partner at Withum since February 2026, based in Greater Boston. Laura Smith was Managing Director at CBIZ from 2024 to 2026, Tax Director at CBIZ from 2019 to 2024 and Tax Manager at CBIZ from 2014 to 2018, and was Senior Tax Manager at Ambrosi Donahue Congdon & Co., P.C. from 2006 to 2014.
Ryan W. Bixenman, MS
LinkedInExperience: Tax Partner · Withum
Ryan W. Bixenman has been Tax Partner at Withum since July 2024, based in Morristown, New Jersey, and the profile describes specializing in the financial services industry and leading the firm’s Venture Capital practice. At Withum, Ryan W. Bixenman was also Senior Tax Manager from 2022 to 2024 and Tax Manager from 2019 to 2022.
Vincent Greenberg, CPA
LinkedInExperience: Tax Partner · Withum
Vincent Greenberg has been Tax Partner at Withum since July 2026, based in the New York City Metropolitan Area, and the listing also shows a Tax Principal row at Withum starting in January 2023. Vincent Greenberg was Senior Tax Manager at KPMG US from 2010 to 2023.
Choose the right perspective
Match the person's tax focus, such as investment funds, digital assets, sports and entertainment or high-net-worth families, to the question you want to explore. Weigh how long each person has been a partner and which office they work from, since that shapes the range of work they have seen.
Questions to take into the conversation
- 01What does a typical week look like for you as a tax partner?
- 02How has your own tax practice changed since you became a partner?
- 03Which tax questions do you find people most often raise too late?
Reaching Withum tax partners
How can I contact one of these Withum tax partners?
Pick one of the 10 people on this page and choose "Book a paid call", or describe your project to find others. You offer a fee for a 15-minute call or a written answer, Instant Expert finds the person's work email and sends the invitation, and they decide whether to accept. The list covers 1 company: Withum, based on profile data retrieved on October 25, 2026. Being listed here doesn't mean someone has agreed to take calls.
How much does it cost to reach Withum tax partners?
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What if they don't reply?
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Can an AI agent ask one of these Withum tax partners a question?
Yes. An agent with a USDC wallet on Base can ask one question without an Instant Expert account. It names the person, for example by the LinkedIn URL on this page, and pays per ask over x402 (HTTP 402). The person answers in writing or by voice note, and if nobody answers within 7 days, the payment goes back to the wallet automatically. Claude and ChatGPT can do the same through the Instant Expert connector: setup is at /docs/mcp for Claude and /docs/chatgpt for ChatGPT. x402 docs
About this directory
This is a professional research starting point based on business profile data retrieved on . Titles and companies reflect that source snapshot; roles marked former had ended by then. Check the linked profiles for current details. Inclusion does not imply Instant Expert membership or availability.