A seasoned trial lawyer and former federal prosecutor, Tinos Diamantatos serves as Managing Partner of Morgan Lewis’ Chicago Office and is co-leader of the firm’s Global White Collar and Government Investigations Practice Group. He is a Fellow of the American College of Trial Lawyers, one of the premier, invitation-only legal associations in North America. Tinos 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 “highly recommended” for dispute resolution, corporate investigations, and white-collar defense by the Legal 500. In 2023, he was listed as one of Crain’s Chicago Business “Notable Litigators and Trial Attorneys.”
Tinos is a first-chair trial attorney that has tried more than 20 cases and achieved an outstanding record of success at trial. Tinos’ trial representations span several industry sectors and jurisdictions in both federal and state courts throughout the United States in both complex civil and criminal matters. He has handled matters involving alleged public corruption, extortion, healthcare fraud, commodities fraud, mortgage fraud, money laundering, bank fraud, wire and mail fraud, and tax evasion. Included among his trial successes are two separate trial wins for a Fortune 10 company.
Prior to joining Morgan Lewis, Tinos was 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, including cases involving terrorism, racketeering, extortion, corruption, obstruction, and civil rights violations. 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. Tinos 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. Tinos 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 also coached many successful trial teams competing at the national level. He also teaches, by invitation, law enforcement courses on trial techniques and investigative tactics to federal agents at their national training centers. He has been a proud member of the Hellenic Bar Association of Illinois since law school.
Join us in recognizing Tinos Diamantatos during the 75th Annual Scholarship Ball on Saturday, November 1, 2025, at the Hilton Oak Brook Hills Resort.