Feliciano has a degree in History and Art History from Brandeis University, a Master’s degree from the School of Journalism at Columbia University and a Ph.D. in Comparative Literature from the University of Paris. He has written for El País, Clarín, The Washington Post, Los Angeles Times, and the magazines Etiqueta Negra, Letras Libres and El Malpensante.
His book The Lost Museum - The Nazi Conspiracy to Steal the World's Greatest Works of Art, is the result his extensive investigative journalism for which the School of Journalism at Columbia University in New York awarded him a fellowship in the prestigious National Arts Journalism Fellowship Program (NAJP). He was also a member of the Presidential Commission on Holocaust Assets in the United States formed during the presidency of Bill Clinton.
In 1999 he organized the first symposium on cultural property and patrimony at Columbia University, and in 2016 was president of VII CILE, the International Congress on the Spanish Language in San Juan, Puerto Rico. He is a member of the Advisory Board of FNPI, where he has directed workshops on cultural journalism. He has been the editor and editorial director of the books The Best Latin American Journalism and Gabo, Journalist.