Mohel
A mohel (Hebrew: מוֹהֵל [moˈhel], Ashkenazi pronunciation [ˈmɔɪ.əl], plural: מוֹהֲלִים mohalim [mo.haˈlim], Aramaic: מוֹהֲלָא mohala, “circumciser”) is a Jew trained in the practice of brit milah, the “covenant of circumcision.”
Wikipedia
Mohel (noun)
The person who performs the circumcision in a Jewish bris
Izmel (noun)
A specialized surgical knife used by the Brit Milah for infant males. It must have certain characteristics, per Jewish Law, including that it may not stop the flow of blood (unlike the constricting devices commonly used by a surgeon or Urologist).
Wiktionary