Marquis Top Lawyers

Ralph F. Antonioli

Title: Attorney
Company: Private Practice
Location: Washington, D.C., United States

Ralph F. Antonioli, attorney at private practice, has been recognized by Marquis Who’s Who Top Lawyers for dedication, achievements, and leadership in the field of international law.

With more than 25 years of experience to his credit, Mr. Antonioli has cultivated a career of excellence in the field of law. Specializing in international law, primarily pertaining to immigration and more recently in the international arbitration space, he had served as a staff attorney at Sidley Austin LLP in Washington, D.C. from 2021 to 2023, at which point he established his private practice. He originally joined the esteemed law firm in 2020 as a senior litigation paralegal in Chicago. As a lawyer, Mr. Antonioli supports his firm in legal matters in Latin America and Italy by reviewing communications, putting together legal defense strategies and handling other litigation issues such as internal investigations. He is both qualified in the common and civil law systems, and is fluent in five languages, English, Spanish, Italian, Portuguese and Guaraní.

Originally from Paraguay, Mr. Antonioli began his legal career in 1996, working with the Ministerio Público as a legal assistant until 2000. He subsequently became an assistant prosecutor for the institution, a position he would maintain until 2004. After immigrating to the United States, Mr. Antonioli joined Karen K. Meade & Associates, where he excelled as a law clerk between 2004 and 2005. Since then, he has worked with several other law firms, including Rogers & Rogers Inc., Hussain, Bendersky & Liston LLC, and Vedder Price, and his own in Paraguay, Torres, Antonioli & Asociados.

Ever committed to his profession, Mr. Antonioli remains affiliated with several industry-related organizations, including the Italian Cultural Society of Washington, D.C. and The American Society of International Law. Furthermore, he maintains his membership in several bar associations, such as the American Bar Association, The District of Columbia Bar and the Hispanic Bar Association of the District of Columbia. In his scholarly efforts, Mr. Antonioli co-authored a recent 2023 article featured in Bloomberg Law, titled “DOJ Expectations for Corporate Environmental Compliance Programs.”

As part of his vocational journey, Mr. Antonioli pursued a formal education. To wit, he earned a Juris Doctor at the Universidad del Norte in Paraguay in 2000 and a Master of Laws at the Thomas R. Kline School of Law of Duquesne University in 2008. In light of his fulfilling career, he has largely attributed his success to his tenacity and faith. Accounting for his accomplishments, Mr. Antonioli is most notably proud of his willingness to take on new “impossible” challenges and tasks, regardless of the difficulty. In the coming years, he looks forward to continue making a difference in people’s lives in the United States and around the world.

For more information, please visit:
Mr. Antonioli at Sidley Austin LLP
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