While Chief Rabbi, Metzger was active in attempting to reach out to diverse groups of people, both Jews and non-Jews. He attempted to facilitate the maintaining of kashrut standards in Israel by employing technology, for instance, by activating steam pumps via cell phone for cooking meat in order to avoid issues of "bishul akum" (the cooking of food by a non-Jew). Metzger was also involved in strengthening ties between Israeli and Diaspora standards of kashrut in order to make them more standardized and consistent.