fierro has served as a member of the american medical association and the international association for identification, a fellow of the american society of clinical pathologists, the college of american pathologists, and the american academy of forensic sciences and was a former president of the national association of medical examiners. fierro has been a consultant to the federal bureau of investigation's task force on national crime investigation center, unidentified persons and missing persons files, washington d.c., since 1983. she has served on the board of editors for the american journal of forensic medicine and pathology since 1979.