Mark is the co-founder and co-chairman of Gerson Lehrman Group, which enables clients to learn about a diverse array of business subjects by connecting them with experts in relevant fields. He is also co-founder and co-chairman of Thuzio, which provides businesses and professionals with an all access pass to celebrity talent through database, booking and event services. Mark is also the international chairman of United Hatzalah, which is a distributed network of first responders in Israel. By activating the responder closes to a trauma, volunteers can arrive at a victim's side in minutes. Mr. Gerson is the author of many books and articles, including intellectual history, education, basketball, and the Biblical Jonah. He lives in New York City with his wife, Rabbi Erica Gerson, and their three children.