Rav Zushe Yosef Blech zt”l

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It is with great sadness that Matzav.com reports the passing of Rav Zushe Yosef Blech zt”l of Monsey, NY.

Rav Blech was widely considered one of the world’s leading experts in modern kosher food production and technology, serving for over twenty years in administrative and field positions relating to all aspects of kashrus certification.

In his younger years, Rav Blech learned at Yeshivas Ner Yisroel in Baltimore and received semicha from Rav Yaakov Yitzchok Ruderman zt”l. He attended Johns Hopkins University, receiving a degree in political science.

Rav Blech served for fourteen years as a regional director for the kashrus division of the OU and then and then served as a technical and halachic consultant to virtually all of the major kashrus certifying agencies worldwide.

Rav Blech wrote articles and lectured throughout the world on the entire gamut of kashrus issues, consulting with major food manufacturers to educate them on kashrus issues, obtaining certification, and resolving kashrus issues.

Rav Blech was a foremost authority on the integration of modern food technology with kashrus requirements, including those relating to such cutting-edge issues as biotechnology and enzymology.

Rav Blech was the author of the encyclopedic work Kosher Food Production, a definitive work on kashrus certification, and his articles on kashrus were published by a variety of kashrus organizations worldwide.

Rav Blech last directed kashrus certification for Kehillas Bais Benzion in Monsey and served as the kashrus administrator of EarthKosher.

The levayah will be held tomorrow at the kevurah at 1:30 p.m. at 6300 Hamilton Avenue in Rosedale, Maryland.

The family will be sitting shivah at 6205 Lincoln Avenue. Parking is at Ner Tamid. Shacharis is at 7:30 a.m., and Mincha/Maariv is at 5 p.m.

Yehi zichro boruch.

{CB Frommer-Matzav.com}


  1. I met rabbi blech in Chicago Years ago. He really was a genius in all aspects of Halacha. His personal library was amazing. His hacnosas orchim was outstanding.

  2. Reb Zushe Blech was head n shoulders above all in the kashrus arena in food chemistry, etc.
    His passing is a big loss to the International world of kashrus, no one to replace him.


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