About

David Whalen is an attorney with Sullivan & Cromwell LLP in Washington, DC, where he practices general law with a focus on delivering thoughtful, practical counsel to clients facing a wide range of legal matters. Based in the nation’s capital, Mr. Whalen brings a disciplined, client-centered approach to his work, helping individuals and organizations navigate complex legal issues with clarity and confidence. His practice reflects the adaptability and broad-based knowledge required to address diverse matters in a fast-paced legal environment. At Sullivan & Cromwell LLP, Mr. Whalen is committed to providing responsive, strategic representation tailored to each client’s goals and concerns. He understands that effective legal advocacy requires not only a strong command of the law, but also careful attention to detail, clear communication, and sound judgment. Whether assisting with day-to-day legal needs or more complex matters, he works to ensure clients receive reliable guidance grounded in professionalism and integrity. Licensed to practice in Washington, DC, and admitted under Bar Number 5696521, David Whalen is part of a distinguished legal team known for high standards and sophisticated service. His practice in general law makes him a valuable resource for clients seeking knowledgeable counsel from an attorney who approaches each matter with diligence, discretion, and a strong commitment to client service.

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