Close
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. He is ranked in Chambers USA and noted as “an outstanding trial lawyer” who is “a creative, forceful and tireless advocate” and “tremendous for clients and a good counselor.” He is listed in 2026 Lawdragon 500 Leading Litigators in America, is listed in The Best Lawyers in America for White-Collar Criminal Defense, and is recognized and recommended for dispute resolution, corporate investigations, and white-collar defense by the Legal 500 US.
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.
Listed as one of Crain’s Chicago Business “Notable Litigators and Trial Attorneys” for 2023, Tinos has tried more than 20 cases and achieved an outstanding record of success at trial. Tinos’ trial representations span jurisdictions in both federal and state courts throughout the United States and have involved complex civil and criminal matters. Included among his trial successes are two separate trial wins for a Fortune 10 company.
Tinos’ representations span several industry sectors, including the retail, pharmaceutical, healthcare, pharmacy, medical device, and financial services industries. He has handled investigations, the defense, and prosecutions of matters involving alleged healthcare fraud, commodities fraud, mortgage fraud, money laundering, bank fraud, wire fraud, mail fraud, and tax evasion. He has also handled other complex matters involving terrorism, racketeering, extortion, corruption, obstruction, and civil rights violations.
Tinos has been trusted by Fortune 500 companies, industry-leading pharmaceutical and healthcare companies, retail pharmacy chains, financial institutions, privately held businesses, and individuals in matters of utmost importance. He helps clients navigate government investigations, regulatory minefields, and related white collar litigation throughout the United States and around the world.
Prior to joining King & Spalding, Tinos was a partner at an AmLaw 25 firm where he served as the Chicago office managing partner and as co-head of that firm’s global white collar and government investigations practice group. Before joining private practice, Tinos served as a federal prosecutor at the U.S. Attorney’s Office in Chicago where he successfully handled high-profile cases and trials that received national and international media attention. He also successfully served as lead appellate counsel representing the government on nine appeals before the U.S. Court of Appeals for the Second and Seventh Circuits. He served in a number of sections within the Chicago U.S. Attorney’s Office, including the Financial Crimes and Special Prosecutions Section, and the office’s Public Corruption and Organized Crime Section, where he completed his career as a prosecutor.
Tinos 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.
back
