King & Spalding LLP

Partner

As a seasoned first-chair trial lawyer and former federal prosecutor, Tinos Diamantatos is a Fellow of the American College of Trial Lawyers, one of the premier, invitation-only legal associations in North America.

Tinos is a premier courtroom advocate and trusted strategic advisor to corporations, boards, C-suites, senior executives, and individuals in their most consequential criminal, regulatory, and complex business litigation. This includes general litigation matters related to government investigations, qui tam litigation, government and internal investigations, and securities enforcement proceedings. He is recognized for leading high-stakes white-collar government enforcement, and complex commercial matters where the margin for error is zero and the cost of failure is existential.

Mr. Diamantatos is also a former federal judicial law clerk and a former president of the prestigious Chicago Inn of Court. He maintains an active pro bono practice and is involved in multiple mentoring initiatives. He is a former member of the John Marshall Law School Board of Trustees and has served as an adjunct trial advocacy professor for the law school, where he has coached many successful trial teams competing at the national level. He teaches, by invitation, law enforcement courses on trial techniques and investigative tactics to federal agents at their national training centers. In 2025, the Hellenic Bar Association recognized him with its “Lawyer of the Year” Award.