Speaker 12.11.25
12.11
ABA 2025 Criminal Tax Fraud and Tax Controversy Conference
Wynn Las Vegas
3131 Las Vegas Blvd S
Las Vegas, NV 89109
Darianne De Leon is a U.S. Tax Court–trained attorney representing companies and individuals in high-stakes federal tax disputes, bringing sound judgment and administrative and litigation experience to tax enforcement-facing matters.
Darianne advises corporations, private clients and other organizations in federal tax controversies, administrative appeals and litigation involving the IRS and Department of Justice. She draws on her clerkship experience at the U.S. Tax Court to efficiently evaluate procedural options, negotiate with government agencies and guide clients through disputes that materially affect their business and reputational interests.
Representative Experience
- Assisted the defense of taxpayers in multimillion-dollar income tax deficiency cases involving valuation disputes before the U.S. Tax Court.
Professional Highlights
- Former Co-Vice Chair, ABA Women in Tax Forum
- Frequent speaker at ABA Tax Section meetings on tax litigation and professional development
- Ambassador and Junior Board alum, Girls Inc.
View More
- “What Matters More: Preserving a Fundamental Right to Privacy or Tampering with Another’s Dignity Through Searches Because of “Reasonable Suspicion,” Darianne De Leon, American University Journal of Gender, Social Policy & the Law: Vol. 27 : Iss. 4, Article 3, 2019
- ABA Tax Section Member; NYSBA Member
- First-generation immigrant from Trinidad and Tobago, committed to mentorship and mobility initiatives.
- Publications
- Contributing author for “General Ethical Considerations for Tax Controversy Attorneys and Proposed Amendments to Circular 230—Implications for Tax Practitioners,” both Wolters Kluwer publications.
- Speaking Engagements
- “Talking Across the Years: Generational Diversity in Tax Practice,” ABA 2025 Criminal Tax Fraud and Tax Controversy, December 12, 2025.
Education
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LL.M., Taxation, Georgetown University Law Center, 2021
J.D., American University, Washington College of Law, 2020
B.A., John Jay College of Criminal Justice, City University of New York, 2015
Admissions
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New York
District of Columbia
Courts
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U.S. Tax Court
U.S. Court of Federal Claims
Clerkships
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U.S. Tax Court (clerkship, Hon. Tamara W. Ashford)
Bronx County Supreme Court (internship, Hon. Richard Lee Price)