James Mastracchio - Winston & Strawn LLP

In the complex world of tax law, particularly when dealing with civil and criminal enforcement matters, businesses, boards of directors, and senior executives in the District of Columbia face unique and often high-stakes challenges. Navigating federal tax controversies, responding to IRS investigations, or defending against alleged criminal tax violations requires highly specialized expertise and a seasoned advocate. In a city like Washington D.C., which serves as a nexus for federal agencies and global commerce, the demand for such precise legal counsel is constant.

This article introduces James Mastracchio, a widely recognized leader in global tax controversy and criminal tax enforcement, who is a partner at Winston & Strawn LLP's Washington D.C. office. We will explore his extensive experience, the comprehensive range of services he offers, and why his capabilities, combined with the firm's robust presence, make him a pivotal resource for navigating the most difficult legal and tax regulatory challenges faced by entities and individuals in the District of Columbia. Our aim is to provide a clear, engaging, and factual overview from the perspective of a local D.C. user seeking top-tier tax legal support.

Winston & Strawn LLP's Washington D.C. office is strategically located at 1901 L St NW, Washington, DC 20036, USA. This address places the firm in a prime area of the nation's capital, ensuring excellent accessibility for clients situated throughout the District of Columbia and the wider metropolitan area. The L Street corridor is a well-known hub for professional services, making it a familiar and convenient destination for those seeking legal counsel.

The accessibility of this office is a significant advantage for clients. For those utilizing public transportation, the firm is within easy walking distance of several key Metro stations. Farragut North (Red Line) and Farragut West (Orange, Blue, and Silver Lines) provide direct connections from various D.C. neighborhoods, as well as suburban Maryland and Virginia. Numerous Metrobus routes also serve the immediate vicinity, offering additional convenient transit options. If you prefer to drive, the location benefits from its proximity to major city arteries, and while street parking can be competitive in this central business district, multiple commercial parking garages are available in the surrounding blocks. This central and well-connected location underscores Winston & Strawn's commitment to serving its D.C. clientele effectively and efficiently.

James Mastracchio is a recognized authority in civil and criminal tax enforcement matters, representing a diverse range of clients from publicly traded companies to senior executives. His practice at Winston & Strawn LLP's Washington D.C. office covers all phases of federal tax controversies, and he is one of the few lawyers in the country who has served as lead counsel on international criminal tax cases. His services are crucial for entities and individuals facing intense scrutiny from tax authorities.

• Civil Tax Controversies: Jim represents clients in all stages of federal civil tax controversies, including matters before IRS Examination, IRS Appeals, Post-Appeals Mediation, and in federal courts. He aims for the earliest possible resolution of civil tax disputes.
• Criminal Tax Enforcement: He defends publicly traded companies, boards of directors, and senior management facing criminal investigations and prosecutions for alleged tax violations. This includes defending investigations conducted by IRS Criminal Investigation, the DOJ-Tax Division, and grand jury proceedings and prosecutions by U.S. Attorney's Offices nationwide.
• International Criminal Tax Cases: Jim is a leader in handling complex international criminal tax cases, advising multinational companies on treaty interpretation, inter-governmental agreements, tax information exchange agreements, competent authority proceedings, summons and subpoena enforcement, and other U.S. and intra-governmental investigatory procedures.
• Sensitive Governmental Investigations: He represents public and private companies, boards of directors, and senior executives in sensitive governmental investigations involving tax and financial matters, whether in civil, criminal, or parallel proceedings.
• Voluntary Disclosures & Offshore Holdings: Jim has counselled clients facing investigations into offshore holdings and structured products, and has assisted with voluntary disclosures, resolving these investigations favorably. He also served as an independent examiner in the U.S. Department of Justice's Swiss Bank Program.
• Tax Litigation: He litigates in every U.S. federal court having jurisdiction over civil and and criminal tax enforcement matters, bringing decades of advocacy experience.
• Compliance Programs: His expertise extends to advising on compliance programs to mitigate tax-related risks.

James Mastracchio's distinguished career and specialized focus offer several key features and highlights that make him a preeminent choice for clients in the District of Columbia facing complex tax and financial legal challenges.

• Foremost Advisor in Global Tax Enforcement: Jim is widely recognized as a leading adviser to the global tax community on civil and criminal tax enforcement matters, bringing decades of experience.
• Unique Experience in International Criminal Tax: He is one of the few lawyers in the U.S. who has served as lead counsel on international criminal tax cases, handling multi-jurisdictional investigations conducted jointly by U.S. and foreign governmental agencies.
• Certified Public Accountant (CPA): His background as a Certified Public Accountant provides a deep understanding of the financial and accounting aspects underlying tax controversies, offering a comprehensive perspective to his legal strategies.
• Broad Agency Representation: He routinely represents clients before a wide array of agencies, including the U.S. Department of Justice (DOJ), U.S. Attorney's Offices, the Internal Revenue Service (IRS), the U.S. Competent Authority, and State Attorneys General.
• Highly Recognized by Legal Guides: Jim is consistently recognized in prestigious legal guides such as Lawdragon's “500 Leading Global Tax Lawyers” and “500 Leading Global Litigators” (for International Litigation & Arbitration, especially Tax), Legal 500 US (for contentious tax and international tax), and International Tax Review Tax Controversy Leaders, cementing his reputation as a top-tier attorney in his field.
• Thought Leadership & Publications: He frequently contributes to legal discussions and publications, including Winston & Strawn's Tax Impacts Blog, on topics like IRS enforcement priorities and compliance strategies, demonstrating his ongoing engagement with evolving tax law.
• Strategic Resolution Focus: Jim is known for his ability to solve clients' most difficult legal and tax regulatory challenges, focusing on achieving the earliest possible resolution whether in civil, criminal, or parallel proceedings.

As a prominent international law firm, Winston & Strawn LLP, including its Washington D.C. office and attorneys like James Mastracchio, typically focuses on delivering top-tier legal expertise and strategic advocacy tailored to complex client needs, rather than offering publicly advertised promotions or special discounts. The value provided is inherently tied to the high level of specialized knowledge, the extensive experience of its attorneys, and the firm's proven track record in navigating challenging legal and regulatory environments.

Prospective clients interested in James Mastracchio's services, particularly in areas such as civil and criminal tax controversy, international tax enforcement, or sensitive governmental investigations, are encouraged to directly contact the Washington D.C. office. During an initial consultation, you can discuss your specific legal situation, and the firm can then provide a clear understanding of how their expertise can be applied to your case, along with transparent details regarding their fee structures. The investment in such highly specialized legal counsel is often critical for businesses and individuals facing substantial tax and financial legal risks.

To connect with James Mastracchio and Winston & Strawn LLP for legal inquiries or to schedule a consultation, you can use the following contact information:

Address: 1901 L St NW, Washington, DC 20036, USA

Phone: (202) 282-5849

Mobile Phone: +1 202-282-5849

Direct contact via phone is often the most efficient way to initiate a discussion about your legal needs and arrange for a consultation.

For locals in the District of Columbia, James Mastracchio and Winston & Strawn LLP offer an exceptionally suitable and critical legal resource, particularly for individuals and entities embroiled in complex tax controversies or facing criminal tax enforcement. The firm's central location in Northwest D.C. ensures easy accessibility for clients across the city, making consultations and collaborative efforts convenient.

In a city that is a global center for policy and regulatory enforcement, James Mastracchio's specialized expertise in both civil and criminal tax matters, particularly those with international dimensions, is immensely valuable. Many D.C.-based businesses, multinational corporations, and high-net-worth individuals frequently encounter scrutiny from the IRS and DOJ. His unique experience as lead counsel on international criminal tax cases and his background as a CPA provide a distinct advantage in navigating these intricate and high-stakes legal landscapes. For D.C. residents and companies that require robust, strategic legal defense and proactive guidance to manage significant tax-related risks and ensure compliance, James Mastracchio and the Washington D.C. office of Winston & Strawn LLP stand out as a premier choice.