Marissa is the daughter of Dr. and Mrs. Bradley Bradford of Delray Beach, Fla., formerly of Mt. Lebanon. She is the granddaughter of the late Mr. and Mrs. Kenneth Kuhns of Greensburg, and Mr. and Mrs. Edwin Cerutti of Delray Beach.

Andrew's parents are Mr. and Mrs. Albert Johnston of Davie, Fla.

Serving as matron of honor was Marla Brown of Delray Beach, sister of the bride.

Maid of honor was Gina Loccisano of Boca Raton, Fla., friend of the bride. Bridesmaids were Angelica Marsico of Mt. Lebanon and Katie Drozynski of Green Tree, both friends of the bride.

The bride is a graduate of Mt. Lebanon High School, the University of Florida where she earned a bachelor of music degree in performance (flute) and a bachelor of psychology degree, and Florida Atlantic University where she earned a bachelor of science degree in nursing. She is employed as an assistant manager at Pediatrics by the Sea in Delray Beach, and will soon be starting as an RN at Boca Raton Regional Hospital in Boca Raton.

The groom is a graduate of Florida Atlantic University and the University of Florida, MPH. He is a research administrator by Premier Research Institute of Palm Beach Neurology in West Palm Beach.