John “Jack” Kropp ’56 was born in Salem, Oregon, to Henry and Lillian Kropp. He graduated from SCU with a bachelor’s in chemistry and received his doctorate in physical chemistry from the University of Notre Dame in 1962. He met his wife, Joann, while at Notre Dame, where she worked in the chemistry department. They were married on campus in 1959 and moved to Southern California in 1962. They lived in the Hollywood Riviera for 55 years. Jack worked at TRW for 30 years. He was a principal scientist on the biology instrument for the Viking mission to Mars. Additionally, he worked on experiments that flew on various shuttle missions. After retiring, Jack worked for Tecolote Research for several years. He enjoyed travel, especially cruises. He had an interest in Mayan history and visited several Mayan sites over the years. He was a member of the Hollywood Riviera Sportsman’s Club and a volunteer at Providence Little Company of Mary and the Torrance Public Library. Jack died on June 24, 2018. He is survived by his wife, Joann, children David Kropp ’92, Michael Kropp ’85, Rachel Powell, and Daniel, eight grandchildren, his sister-in-law, Gail, and a niece.