Gutnick is a member of the Melbourne Beth Din and an authority in the field of kashrut. He has been a Rabbinic Administrator of the Kosher Australia agency (formerly Melbourne Kashrut) since 1997.
Gutnick has also served as president of the Organisation of Rabbis of Australasia and vice president of the Rabbinical Council of Victoria. In 2012 he received the council's prestigious Patron award.
In 2008 Gutnick officiated at the first Jewish wedding ever hosted by Australia's Parliament House in Canberra, when the federal member for Melbourne Ports Michael Danby married Amanda Mendes Da Costa. The wedding was attended by Australian Prime Minister Kevin Rudd and his deputy among 150 guests.
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- "Australian gov’t hosts Jewish wedding". Jewish Telegraphic Agency. 2008-02-25. Retrieved 2010-04-22.
- Sharah, Jehane (2008-02-24). "Parliament House to host its first Jewish wedding". The Sydney Morning Herald. Retrieved 2010-04-22.
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