Quiñones joined ABC News in June 1982 as a general assignment correspondent based in Miami, providing reports for "World News Tonight with Peter Jennings" and other ABC News broadcasts. He was one of the few American journalists reporting from Panama City during the U.S. invasion in December 1989.
Prior to joining ABC News he was a reporter with WBBM-TV in Chicago. He won two Emmy Awards for his 1980 reporting on the plight of illegal aliens from Mexico. From 1975 to 1978, he was news editor at KTRH radio in Houston, Texas. During that period, he also was an anchor-reporter for KPRC-TV.
Quiñones received a bachelor of arts in speech communications from St. Mary's University, San Antonio, Texas. He received a master's from the Columbia School of Journalism.