Sister Rosemary Delaney, who served as a teacher, principal and administrative assistant in schools in five different East Coast states, died Sept. 10 at Lourdes Health Care Center in Wilton, of cardiac arrest. She was 83, and had been a professed member of the School Sisters of Notre Dame (SSND) for 63 years.

Rosemary Delaney was born Feb. 17, 1929, in New York City. In 1946, after attending high school at the SSND Juniorate in Fort Lee, N.J., she entered the congregation of women religious. She was given the religious name Nicholas Mari and professed her first vows in August 1949. She professed her final vows in 1955.

After a career as a teacher and school administrator, she became an administrative assistant in the finance office of Villa Notre Dame, home to retired School Sisters in Wilton. She remained in service here 17 years, until retiring in 2008.

Sister Rosemary, who had resumed using her given name, was a 1956 graduate of Nazareth College in Rochester, N.Y. She earned a master's in education administration from Villanova University.

A Mass of Christian burial was held Sept. 13 in the Chapel at Villa Notre Dame in Wilton, Conn. Burial will take place at a later date.