Mayor Fiamingo was born in Kenilworth on April 21, 1954. She attended St. Theresa's Grammar School and David Brearley Regional High School, graduating in 1972. She is a cum laude graduate of Seton Hall University and Seton Hall Law School. She has also obtained a Masters in Law in Taxation from New York University School of Law. Mayor Fiamingo currently practices law in Kenilworth as a sole practitioner.
Mayor Fiamingo served as a member of the Kenilworth Board of Education from 1991 through 1995. In 2001 Mayor Fiamingo took office as a councilwoman, and served until 2003. She was again elected to council in 2007 and was elected Mayor in 2008. She was reelected as Mayor in 2012.