Radzyner is a Senior Law Lecturer at Bar-Ilan University in Israel. His areas of research interest include Talmudic Law, History of Jewish Law Research, Israeli Legal History, Rabbinical Courts, and Jewish Family Law.

Radzyner is also the Chief Editor of the HaDin veHadayn (The Law and its Decisor): Rabbinical Court Decisions in Family Matters, a position he has held since 2003. From 2005-2006 he was a visiting scholar at the Institute for Research in Jewish Law at The Hebrew University of Jerusalem. From 1999-2006, he worked as a researcher for The Israel Democracy Institute on the State and Religion Project.

Radzyner has received numerous academic awards and grants over the years including a 1999 Yaacov Herzog Foundation Prize for Jewish Law Doctoral Students, a 1999-2001 post-doctoral grant from The Memorial Foundation for Jewish Culture, the 2008 Cegla Prize for the Best Article of a Young Legal Scholar in Hebrew, and the 2010 Tager Prize for the Best Article in Jewish Law.

He has authored one book, Dine Qenasot': A Research in Talmudic Law, and was editor of Studies in Halaka and Jewish Law: Judge and Judging. Additionally, he has written several articles and book chapters which have been published both in Israel and the United States.

Radzyner is teaching Introduction to Jewish Law in Spring 2012.