[2] He was a founding director of the Jerusalem International Book Fair,[3] the Israel Debating Society,[4] and the Anglo-Israel Colloquium.
[6] He was England swimming champion in 100 yards (91 meters) backstroke in 1956, and represented United Kingdom in the 1957 Maccabiah Games (Jewish Olympics) in Israel.
He briefly studied Anthropology at London University before moving to Israel in 1958, where he first lived on Kibbutz Beit Hashita before settling in Jerusalem in 1959.
During the years 1969–1993, Weill was the publisher of a very large number of Israel's leaders, among them, Chaim Herzog, Moshe Dayan, Shimon Peres, Golda Meir, Isser Harel, Yigael Yadin, Ezer Weizman, Abba Eban, Yitzhak Shamir, Adin Steinsaltz, Natan Sharansky and Teddy Kollek, as well as international figures, among them, Anwar Sadat, Henry Kissinger and Nancy and Ronald Reagan.
In 1981, Weill was appointed editor of the quarterly magazine Ariel: The Israel Review of Arts and Letters, published by the Israel Ministry of Foreign Affairs in English, French, German, Spanish, Arabic and Russian, with special editions in many other languages, among them Chinese, Japanese and Italian.
From 1986–1991, Weill worked as director of the Press Division of the World Zionist Organization, in which capacity he was the editor of the monthly news magazine, Israel Scene; the World Zionist Press Service, Kivunim, Sabra, Jerusalem Update, and other WZO publications.
From 1977 Weill performed voluntary military service in Melach which ensures the ongoing functioning of civilian life in times of crisis and war.
For the first decade he served in Mevaseret Zion (a small town outside Jerusalem), where he set up the framework at the request of the mayor.