Jo Ann Zino and Dr. Christopher John DiMaio were married Dec. 15 at St. Pius X Roman Catholic Church in Plainview, N.Y. The Rev. Valentine Rebello, a Roman Catholic priest, officiated.

Mrs. DiMaio, 40, is a senior business development manager focusing on global financial services and financial technology industries at the New York law firm Shearman & Sterling. She graduated from Hofstra, from which she also received an M.B.A. in banking and finance.

She is the daughter of Enza Zino and Joseph Zino of Melville, N.Y. The bride’s father retired as an owner of Zino’s Pizzeria and Restaurant that was in Patchogue, N.Y.

Dr. DiMaio, 44, a gastroenterologist, is the director of therapeutic endoscopy focusing on pancreaticobiliary diseases and advanced endoscopy at Mount Sinai Hospital in New York, and an associate professor of medicine at the Icahn School of Medicine there. He graduated from Cornell and received a medical degree from SUNY Buffalo.

He is a son of Jennie DiMaio of Hamilton, N.J., and the late Frank DiMaio. The groom’s father retired as the chief financial officer at the American Tissue Corporation in Hauppauge, N.Y.

The couple, who grew up seven miles from each other in Suffolk County, on Long Island — he in East Northport, and she in Melville — were introduced through an online dating app in spring 2017. Later that year they realized they were in love while taking a Christmas holiday cruise around Manhattan.