About

David Mattern is an attorney with King & Spalding in Washington, DC, where he practices in the firm’s general practice group. Based in the nation’s capital, he works with clients on a broad range of legal matters, bringing a thoughtful, practical perspective to each engagement. His practice reflects the versatility and responsiveness that clients value when seeking counsel for complex and evolving legal needs. At King & Spalding, Mr. Mattern is part of a nationally recognized law firm known for its sophisticated client service and high standards of advocacy. He approaches his work with professionalism, attention to detail, and a commitment to delivering clear, effective legal guidance. Whether supporting businesses, organizations, or individuals, he strives to help clients navigate challenges efficiently while staying focused on their goals and long-term interests. Mr. Mattern is admitted to practice under bar number 5228341. From his Washington, DC base, he serves clients with the dedication and discretion expected of counsel at a leading firm. His general practice experience allows him to address a wide variety of legal issues with flexibility and care, making him a valuable resource for clients seeking dependable legal support in the Washington, DC area and beyond.

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