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Sebastian Kielmanovich teaches Spanish for Legal Studies. He received a J.D. from the University of Buenos Aires School of Law in 1999, and a J.D. from Duke University School of Law in 2004.

Before coming to Duke, he was a practicing attorney in Argentina, specializing in corporate law, intellectual property and contracts, and an Assistant Professor of Business Associations in the University of Buenos Aires. In addition, Kielmanovich worked with the Buenos Aires City Attorney and clerked for a District Judge. 

In the United States, he participated in the Summer Honors Program at the Securities & Exchange Commission in Miami, Florida. He also worked as Staff Attorney for Legal Aid of North Carolina, and as Corporate Counsel for MicroStrategy, Inc. in McLean, Virginia. Kielmanovich served as an Assistant District Attorney in Wake, New Hanover, and Pender counties in North Carolina, where he was assigned to prosecute drug traffickers, habitual felons, and violent offenders. Additionally, Kielmanovich was an Assistant Attorney General with the North Carolina Department of Justice where he served as a statewide special prosecutor and provided legal representation to the Department of Public Safety. Thereafter, Kielmanovich was an Assistant United States Attorney in the Eastern District of North Carolina where he specialized in immigration crime.

Kielmanovich is the founder and managing attorney of Triangle Immigration & Criminal Defense, where he represents clients in immigration and criminal matters. He is also a Captain with the United States Army Reserve JAG Corps where he defends soldiers accused of military violations.

Kielmanovich was a Special Staff Editor on the Duke Journal of Comparative & International Law. He is the author of "Using the Alien File in the Prosecution of Immigration Crimes", 65 U.S. Attorneys’ Bulletin, July (II) 2017, "OIL-DCS Availability for Assistance and Support in Denaturalization Prosecutions under 18 U.S.C. § 1425", 65 U.S. Attorneys’ Bulletin, July (I) 2017 (co-author), and "Immigration Law Manual", DOJ Office of Legal Education (2013) (contributor).

Kielmanovich is a member of the Bar in North Carolina (2004), New York (2005), and the District of Columbia (2008). His native language is Spanish, and he is fluent in English and proficient in Portuguese.