David Mattern is an experienced trial and appellate lawyer who represents technology, media, and entertainment companies in complex litigation and intellectual property matters.  

David has substantial experience defending technology platforms and other companies in suits related to user content, including in copyright litigation, matters involving Section 230, the DMCA, and trademark and trade secret claims.  David has also litigated consumer class actions, securities cases, and constitutional matters.

Before rejoining King & Spalding, David was a law clerk to then-Chief Judge R. Guy Cole (Sixth Circuit). He received his J.D. from Columbia Law School, where he was a James Kent Scholar. 

David has represented clients at trial and appeal in courts across the country. David has particular expertise in copyright law and platform defenses, including representing platforms in copyright litigation and rate court disputes, and in defending platforms in suits related to user content and content moderation under the DMCA and Section 230. His experience extends to a wide range of subject areas, including False Claims Act litigation, product liability litigation, professional liability litigation, and many other types of business litigation.

David devotes a significant amount of time to pro bono civil rights litigation. Recent successful representations include obtaining reversal of a grant of qualified immunity to prison officials in a suit brought under Section 1983 in a case he argued in the Ninth Circuit, and in obtaining a reversal of a grant of summary judgment to prison officials on exhaustion under the PLRA in a case he argued in the Seventh Circuit. 

Back to Page