Susan Seabrook - Winston & Strawn LLP

For businesses and organizations in the District of Columbia navigating the often-complex and high-stakes world of tax controversy and litigation, Susan Seabrook, a distinguished partner at Winston & Strawn LLP, stands as a top-tier legal resource. In an environment where tax laws are constantly evolving and the implications of non-compliance can be severe, having counsel with profound expertise and a proven track record is essential. Susan Seabrook is widely recognized as a go-to tax controversy counsel, particularly for companies operating in heavily regulated industries. Her practice emphasizes complex procedural, technical, and industry-specific tax issues, offering clients in D.C. and beyond a knowledgeable and thorough approach to resolving tax disputes.

The intricacies of tax law, especially at the federal level and for multinational corporations, demand a lawyer who not only understands the statutes but also possesses practical experience within the regulatory bodies themselves. Susan Seabrook brings invaluable insights from her prior role as a senior trial attorney for the Internal Revenue Service (IRS) Office of Chief Counsel, where she also served as IRS Industry Counsel for the life insurance industry. This background equips her with a unique perspective on administrative tax controversy and tax litigation, allowing her to anticipate the IRS's approach and craft effective defense strategies. For D.C. businesses, this means gaining access to a legal professional who has firsthand experience with the very system they are navigating, facilitating more effective and efficient resolutions.

Susan's dedication extends beyond just litigation; she provides strategic advice on risk assessment, best practices, and privilege issues in cross-border and multi-jurisdictional tax matters. She helps clients craft global solutions to complex tax challenges that might involve parallel non-tax business disputes or regulatory investigations. Her ability to integrate business, regulatory, and reputational priorities into legal strategies ensures that clients receive comprehensive and holistic counsel. For companies in D.C.'s diverse economic landscape, particularly those in healthcare, energy & infrastructure, technology, and financial services (especially multinational insurance and reinsurance), Susan Seabrook offers an unparalleled depth of expertise and a commitment to protecting their interests.

Susan Seabrook practices at the Washington, D.C. office of Winston & Strawn LLP, conveniently located at 1901 L St NW, Washington, DC 20036, USA. This prime address places her and the firm in the heart of Washington, D.C.'s central business district, ensuring exceptional accessibility for clients across the District of Columbia and the broader metropolitan area. L Street NW is a well-known and easily navigable thoroughfare, making the office straightforward to locate.

The firm's location offers excellent access to public transportation. It is within a short walking distance of several Metrorail stations, including Farragut North (Red Line) and Farragut West (Blue, Orange, and Silver Lines). This robust public transit connectivity provides a significant advantage for clients, allowing them to reach the office efficiently without having to contend with D.C.'s often challenging traffic or parking, which is particularly beneficial for busy executives and legal teams.

For those who prefer to drive, while street parking in downtown D.C. can be limited, numerous commercial parking garages are available in the immediate vicinity of 1901 L St NW. The office is situated within a modern and professional building, offering a conducive and confidential environment for high-level legal consultations. This central and well-connected location underscores Winston & Strawn's commitment to serving its D.C. and national client base with convenience and professionalism.

Susan Seabrook, as a partner at Winston & Strawn LLP, offers highly specialized legal services focused on intricate tax matters for companies in regulated industries. Her practice areas include:

• Tax Controversy & Litigation: Representation of clients in all phases of administrative tax controversy (e.g., audits, appeals) and tax litigation, including trials in the United States Tax Court and collaborations with the Department of Justice on refund litigation.
• Complex Procedural, Technical, and Industry-Specific Tax Issues: Advising on challenging tax matters that require a deep understanding of unique industry regulations and highly technical tax codes.
• Cross-Border and Multi-Jurisdictional Tax Controversy: Handling tax disputes that involve international elements, including competent authority issues and global information exchange practices, leveraging her experience from a simultaneous audit with the Japanese National Tax Administration.
• Risk Assessment and Best Practices: Providing strategic advice to clients on identifying and mitigating tax-related risks, and implementing best practices to ensure compliance and avoid future controversies.
• Privilege Issues in Tax Matters: Advising on attorney-client privilege and work product protection in the context of tax investigations and disputes.
• Strategic Tax Advice for Regulated Industries: Specializing in the healthcare, energy & infrastructure, technology, and financial services sectors, with a particular focus on multinational insurance and reinsurance businesses.
• Appellate Tax Matters: Experience litigating tax controversy disputes in various forums, including appeals.

Susan Seabrook's practice, supported by Winston & Strawn LLP, offers several distinguishing features and highlights:

• Extensive IRS Experience: Her background as a senior trial attorney for the IRS Office of Chief Counsel and IRS Industry Counsel for the life insurance industry provides an invaluable "insider's" perspective, offering clients unique insights into government strategies and enforcement practices.
• Top-Tier Recognition: Susan has been consistently named to The Best Lawyers in America® in the areas of tax law (2021–2025) and insurance law (2023). She is also recognized by Legal 500 US for contentious US taxes (2009–2011, 2014, 2018–2020, 2022–2024) and featured in Lawdragon's "500 Leading Global Tax Lawyers" (2025) and "500 Leading Global Litigators" (2024).
• Industry-Specific Expertise: Her focus on regulated industries like healthcare, energy & infrastructure, technology, and financial services (especially insurance and reinsurance) means she understands the unique tax challenges and regulatory environments of these sectors deeply.
• Strategic and Global Solutions: Susan is adept at providing strategic advice and crafting "global solutions" to complex tax challenges, considering not just tax implications but also parallel non-tax business disputes or regulatory investigations.
• Frequent Speaker and Author: She is a frequent speaker on IRS practice, controversy, and tax litigation matters, and the author of "Insurance Tax Issues in Mergers and Acquisitions," demonstrating her thought leadership in the field.
• Adjunct Professorship at Georgetown Law: Her role as an adjunct professor teaching Taxation of Financial Institutions at Georgetown University Law Center underscores her profound knowledge and commitment to the next generation of legal professionals.
• Awards from the IRS: Receipt of multiple IRS Special Act Awards (1994, 1995, 1996) and IRS Performance Awards (1997, 1999) before entering private practice further validate her exceptional capabilities and contributions during her government service.
• Part of a Global Powerhouse: Winston & Strawn LLP is a large, international firm with extensive resources and a global reach, providing clients with access to a wide array of legal capabilities beyond tax.

As a partner at a prominent international law firm like Winston & Strawn LLP, Susan Seabrook's practice is focused on serving large corporations and entities with complex, high-stakes tax controversies. Therefore, the concept of "promotions" or "special offers" in the traditional consumer sense (e.g., discounted rates for initial consultations) is not typically applicable or publicly advertised by firms of this stature.

However, clients engaging with a firm of this caliber benefit from an inherent value proposition: access to highly specialized expertise, extensive resources, and a track record of successfully resolving complex tax issues that could have multi-million or even billion-dollar implications. The primary "offer" is the unparalleled depth of knowledge and strategic advantage that Susan Seabrook provides, stemming from her significant experience both within the IRS and in private practice handling high-profile tax matters. Prospective clients seeking her specific expertise are encouraged to contact the firm directly to discuss their needs and the process for engagement.

For companies and organizations in the District of Columbia and beyond seeking expert legal counsel in complex tax controversy and litigation, Susan Seabrook at Winston & Strawn LLP can be reached using the following details:

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

Phone: (202) 282-5220

Mobile Phone: +1 202-282-5220

Prospective clients are encouraged to contact the firm directly to discuss their specific tax-related legal needs and to explore how Susan Seabrook's specialized expertise can provide strategic advantages.

For businesses and organizations located in the District of Columbia, Susan Seabrook, a distinguished partner at Winston & Strawn LLP, is an exceptionally suitable and invaluable legal resource, particularly when facing complex tax controversy and litigation. Her office at 1901 L St NW places her firmly within D.C.'s central business district, offering supreme accessibility for local corporate clients. This prime location, coupled with easy access to major Metrorail stations like Farragut North and Farragut West, ensures that legal teams and executives can conveniently connect with her firm without the typical logistical challenges of navigating a busy urban environment.

What truly makes Susan Seabrook an ideal choice for D.C. locals, especially those in regulated industries, is her unparalleled expertise forged through a career both within the IRS and in top-tier private practice. Her background as a senior trial attorney for the IRS Office of Chief Counsel provides an "insider's" perspective that few other attorneys can offer. This unique insight is critical for D.C.-based companies that frequently interact with federal agencies and navigate intricate regulatory frameworks. Whether dealing with proposed adjustments, audit controversies, or complex multi-jurisdictional tax issues, her ability to anticipate and strategically counter government approaches is a significant advantage.

Furthermore, her deep specialization in sectors vital to the D.C. economy, such as financial services (particularly insurance and reinsurance), healthcare, energy, and technology, means she understands the specific tax challenges these local industries face. The "Very nice" client review, while brief, hints at the positive client experience, which is further substantiated by her consistent recognition in prestigious legal rankings like The Best Lawyers in America® and Legal 500 US. These accolades highlight her standing as a leading authority in tax law, reassuring D.C. businesses that they are engaging with a highly competent and respected professional.

In conclusion, for Washington, D.C. businesses seeking sophisticated, strategic, and experienced legal counsel to navigate the complexities of tax controversy and litigation, Susan Seabrook at Winston & Strawn LLP offers an unmatched combination of location, specialized expertise, and a proven track record. Her ability to blend deep legal knowledge with practical regulatory insight makes her an indispensable asset for the District's corporate landscape.