Kalman Jacob Mann () (5 July 1912 – 14 March 1997) was an Israeli physician specializing in pulmonology, and the eighth and longest-serving director general of the Hadassah Medical Organization. During his three decades at the helm of the Hadassah HMO, he was credited with the renovation of the hospital campus on Mount Scopus after the Six-Day War, and the construction of a new Hadassah medical center at Ein Kerem. He also sat on 14 different government committees, influencing Israeli health-care legislation. Following his retirement from Hadassah in 1981, Mann shepherded the development of the Yad Sarah medical equipment lending organization, serving as its chairman until his death in 1997. Early life and education Kalman Jacob Mann was born in Jerusalem to Yitzhak David Mann and his wife, Chaya, both Orthodox Jews. He was the eldest of five children. On his father's side, he was a seventh-generation Jerusalemite. He received both a secular and a Talmudic education during his youth, studying in the Tachkemoni School and earning a teacher's diploma at the Mizrahi Teachers Seminary. His father then sent him abroad to study economics at the London School of Economics in 1931. Although Mann wanted to study medicine, he acceded to his father's wishes. Though he could barely speak English, he passed the entrance exam, but three months into the term he realized that economics was not for him and asked his father if he could switch to medicine. His father agreed, whereupon he completed his preliminary studies at Chelsea Polytechnic and, that same year, entered University College Hospital Medical School. In 1937 he received a double degree in Bachelor of Medicine and Bachelor of Surgery, and was accepted as a member of the Royal College of Surgeons. House physician After graduation, Mann was named a house physician at the University College Hospital and spent two years attending to patients in the pulmonology department of various London hospitals. In 1939 he received his Doctor of Medicine degree as well as a diploma in tropical medicine and hygiene from the University of London. He also qualified as a member of the Royal College of Physicians. He married his first wife, Sylvia Gamse, in 1940. He was drafted into the emergency medical corps in World War II and served as a resuscitation officer at RAF Hendon, where he tended to pulmonary cases. Post-war, he worked for two years as a research physician