He is a fifth-generation mohel, and is followed by both his son and son-in-law. He lives in Kew Gardens, Queens, New York with his wife. His five children are married.
Several of his works are in regards to his relationship with the "Maggid of Jerusalem," Rabbi Sholom Schwadron. Krohn also leads tours throughout Europe, speaking about the rich and vibrant Jewish communities that existed prior to World War II.
In December 2004 Rabbi Krohn launched the organization PaL (Phone and Learn)in the United Kingdom when speaking at the thirty day memorial service for a well-respected London chinuch activist, Sammy Homburger. PaL, a division of Partners in Torah in the USA, matches Jews who want to learn more about their heritage with a friendly, knowledgeable tutor for an hour a week of Jewish learning and discussion over the phone.