Lyle D. Kossis Associate

Lyle concentrates on appellate litigation and complex commercial litigation in trial courts.

He has drafted briefs at all levels of the federal judiciary and has won significant victories for his clients in both trial and appellate courts.  Lyle’s practice focuses on a range of complex issues related to constitutional law, banking law, patents, trade secrets, class action litigation, and administrative law. He is often called on to provide strategic advice to clients in the pharmaceutical, telecommunications, financial services, and environmental sectors.  Lyle also participates in the firm’s pro bono efforts and represents indigent defendants before the federal courts of appeal.

Before joining McGuireWoods, Lyle was a law clerk to Judge Karen LeCraft Henderson of the U.S. Court of Appeals for the District of Columbia Circuit.  He was also a litigation associate in the Washington D.C. office of a global commercial law firm.

While pursuing his Juris Doctor at the University of Virginia School of Law, Lyle received the 2013 Law School Alumni Association Best Note Award, and won the William Minor Lile Moot Court Competition.

Experience

Argued and won appeal under the Antiterrorism and Effective Death Penalty Act involving prisoner’s challenge to state conviction based on ineffective assistance of counsel during plea bargaining. 

Argued and won appeal over challenge to federal agency’s failure to promulgate protective regulations for animals bred for use in research and exhibition.

Represented amicus law professors before the U.S. Supreme Court and drafted amicus brief in case about interstate sovereign immunity.

Represented petitioner before the U.S. Supreme Court and drafted petition for a writ of certiorari about sentencing reductions under the federal Sentencing Guidelines.

Represented a telecommunications company before the U.S. Court of Appeals for the Federal Circuit and secured affirmance of the order below holding that the challenged patents were invalid under 35 USC 101.  

Represented a multinational trading company before the New York Appellate Division and secured affirmance of the order below dismissing claims seeking more than $30 million in damages.

Represented a telecommunications company and secured dismissal of claims for patent infringement.

  • District of Columbia
  • Virginia
  • U.S. Court of Appeals for the District of Columbia Circuit
  • U.S. Court of Appeals for the Federal Circuit
  • U.S. District Court for the Eastern District of Virginia
  • U.S. District Court for the Western District of Virginia
  • University of Virginia School of Law, JD, Order of the Coif, Editorial Board Member, Virginia Law Review, 2013
  • University of Florida, BA, Economics, summa cum laude, Phi Beta Kappa, 2010

Selected for inclusion in Best Lawyers: Ones to Watch, Appellate Practice, Commercial Litigation, 2021

Back to top