About David

David A. Oksenhorn is a director with the Research and Development Tax Credits Group in the Firm’s Melville, NY office. He is also an active member of the Firm’s Food & Beverage Services Group. For almost 20 years, he has advised clients in manufacturing, professional services, and other various industries.

Typically, organizations claim less tax benefit than they’re entitled to. David assesses eligibility for R&D credits to obtain the highest potential benefits and significant tax savings to clients. His services help not only well established companies but companies in earlier and startup phases.

Prior to joining the Firm in 2006, David was with two local accounting firms where he serviced clients in various industries and learned the fundamentals of tax and accounting, which he has built upon since joining the Firm.

David is active with the New York State Brewers Association and the American Institute of Certified Public Accountants (AICPA).

His dedication to his community culminated with his inclusion among the Top 40 under 40 Business Leaders of Long Island and a Millennial of the Decade, both by Long Island Business News.

Professional & Civic Affiliations

  • American Institute of Certified Public Accountants (AICPA)
  • New York State Society of Certified Public Accountants (NYSSCPA)
    • Suffolk Chapter Cooperation with Attorneys, Past Co-Chair
    • Suffolk Chapter Next Gen Committee, Past Co-Chair
  • New York State Brewers Association
  • Brewers Association

Articles, Seminars & Presentations

  • Brewery Buddy: New York State Form MT-456 – Beer Tax Return, Marcum Food & Beverage Advisor article, 2022
  • NYS Brewers Association
    • Article, Diversity and Inclusivity in the Craft Beer Industry, 2022
    • Article, Let Me Tell ’Ya About My Best Friend, Form MT-456, 2022
    • Article, In the Land of Acronyms, R&D Is King for Breweries, 2021
    • Presentation, Brewery Accounting 101, 2021
    • Article, Brewery PPP and Employee Retention Credit, 2021
Industry Focus

Closely-Held Businesses
Food & Beverage
Professional Service Firms


Bachelor of Science, Accounting
State University of New York at Geneseo