Katherine was born in New Rochelle, NY, October 13, 1927 to Mary Webber Mallon and Frank G. Mallon. She had one brother, John, and one sister, Margaret. Her parents, her brother and sister have all predeceased her.
Katherine graduated from St. Gabriel’s High School, New Rochelle in 1947. She entered the Maryknoll Sisters Congregation from Blessed Sacrament Parish, New Rochelle in the Archdiocese of New York on September 6. At her Reception, she received the religious name Sister Walter Marie. She made her First Profession of Vows on March 7, 1951 at the Maryknoll Sisters Center. She remained at the center to give service at the Maryknoll Society Seminary, the Sisters’ Center kitchens and with the Sisters’ Promotion Department. In 1956, she was assigned to study nursing for her L.P.N. at Queen of the World Hospital in Kansas City, MO. She made her Final Profession of Vows on March 7, 1954 at the Maryknoll Sisters Center.
Sr. Katherine was assigned to the Maryknoll Sisters’ T.B. Hospital in Monrovia, CA in 1957 where she was recognized for her excellent nursing skills. In 1968, she was sent to Mexico City for language and culture study after which she went to Jacaltenango Hospital in the Department of Huehuetenango, Guatemala. During the next 30 years, 1968 to 1998 she served the indigenous people of Guatemala— with the exception of three years when she returned to Maryknoll to serve in the Residential Care Unit—doing nursing in rural public health, maternity unit in the hospital, outpatient care, teaching public health in villages which included pre and post natal care, a nutrition center for mal-nourished children, and ministering to AIDS patients and their families.
Failing health necessitated her return to the Maryknoll Sisters Center in 2005, where she was a patient in the Maryknoll Sisters Home Care Unit.
A Vespers service will be held for Sister Katherine, Monday, August 29 at 4:15 p.m. in the Main Chapel at the Maryknoll Sisters Center. A funeral Mass will follow on Tuesday, August 30 at 11:00 a.m. also in the Main Chapel at the Maryknoll Sisters Center. Interment will follow in the Maryknoll Sisters Cemetery on the center grounds.