Rabbi Shlomo Eliyahu Miller is a Rosh Kollel

Kollel

A kollel is an institute for full-time, advanced study of the Talmud and rabbinic literature. Like a yeshiva, a kollel features shiurim and learning sedarim ; unlike a yeshiva, the student body of a kollel are all married men...

 (dean) of the Kollel Avreichim Institute for Advanced Talmud

Talmud

The Talmud is a central text of mainstream Judaism. It takes the form of a record of rabbinic discussions pertaining to Jewish law, ethics, philosophy, customs and history....

 Study, the leading haredi post-yeshiva educational institution in Toronto

Toronto

Toronto is the provincial capital of Ontario and the largest city in Canada. It is located in Southern Ontario on the northwestern shore of Lake Ontario. A relatively modern city, Toronto's history dates back to the late-18th century, when its land was first purchased by the British monarchy from...

  and head of its Beis Din (Rabbinical court). He is the foremost Litvish Haredi Posek

Posek

Posek is the term in Jewish law for "decider"—a legal scholar who decides the Halakha in cases of law where previous authorities are inconclusive or in those situations where no halakhic precedent exists....

 (decisor of Rabbinic law) in Toronto, and a prominent Litvish Poskim

Posek

Posek is the term in Jewish law for "decider"—a legal scholar who decides the Halakha in cases of law where previous authorities are inconclusive or in those situations where no halakhic precedent exists....

 in North America.

Rabbi Miller has been chosen to head the Beis Din of the Va'ad Harabonim of Lakewood (Association of Rabbis) of Lakewood, NJ and heads a Kollel there as well. Many members of the Haredi community, view Rabbi Miller as taking a strong stand against any weakening of the rule of Halacha

Halakha

Halakha — also transliterated Halocho , or Halacha — is the collective body of Jewish law, including biblical law and later talmudic and rabbinic law, as well as customs and traditions.Judaism classically draws no distinction in its laws between religious and ostensibly non-religious life; Jewish...

 (Rabbinic law), while many in the Jewish community (including Haredi members as well), see his opinions as being overly stringent, and intolerant of more lenient viewpoints that are based on the ruling of other prominent authorities. One example relates to the use of Sabbath Mode ovens on festivals - see below.

Shabbos Mode Ovens

Rabbi Miller was one of the signatories to the ruling forbidding changing the temperature of Shabbos Mode ovens on Yom Tov, alleging that Rabbi Moshe Heinemann

Moshe Heinemann

Rabbi Moshe Heinemann is an Orthodox rabbi and Posek who heads the Agudath Israel of Baltimore synagogue and is the rabbinical supervisor of the Star K kashrus certification agency...

 was the sole Haredi authority to permit it.

Slifkin Controversy

Rabbi Miller wrote a letter voicing his support of the controversial ban of Rabbi Natan Slifkin's

Natan Slifkin

Natan Slifkin , also popularly known as the "Zoo Rabbi", is an ordained but non-pulpit serving Orthodox rabbi best known for his interest in zoology, science and for his books on these topics, which are controversial in the Haredi world.-Biography:Natan Slifkin was born and raised in Manchester,...

books by a number of prominent rabbis. His defense of the rabbis and the ban, was itself controversial, as evidenced by the responses it generated. Rabbis Miller and Slifkin met in Toronto in December 2007. Rabbi Slifkin reported that, despite their “strong disagreements,” they had “a very pleasant conversation” in “a nice, polite atmosphere.” Rabbi Slifkin noted, however, that nothing was resolved.

Ted Floyd/Natan Levy

Rabbi Miller was the head of the beis din that ruled that Ted Floyd who assumed the name Natan Levy retained the status of a non-Jew and that his wife was Jewish and not complicit in his subterfuge.