About

Mark Lyon is an attorney with Williams & Connolly LLP in Washington, DC, where he practices in the firm’s general practice group. Based in the nation’s capital, he works with clients who need thoughtful, practical legal guidance from a trusted advocate who understands the demands of a fast-paced legal environment. With a broad-based practice, Mr. Lyon is positioned to assist clients with a wide range of legal matters, bringing careful analysis, sound judgment, and a client-focused approach to every engagement. As a Washington, DC attorney, Mr. Lyon is committed to delivering responsive counsel tailored to each client’s goals and priorities. He understands that legal matters often require not only technical skill, but also clear communication and strategic thinking. Whether addressing day-to-day legal issues or more complex concerns, he strives to provide efficient, effective representation grounded in professionalism and attention to detail. Mr. Lyon practices with the support of Williams & Connolly LLP, a firm recognized for its high standards and rigorous advocacy. He is dedicated to helping clients navigate legal challenges with confidence and clarity, always focusing on practical solutions and strong communication. Licensed under Bar Number 4978748, Mr. Lyon continues to build a reputation for dependable service and a steadfast commitment to client interests.

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