Mark Gerson is the co-founder and Chairman of the Gerson Lehrman Group. He is also the co-founder and CEO of Julius, the co-founder and Chairman of Thuzio, co-founder and co-Chairman of Voray, and the co-founder of Quality Reviews.

Mark is the International Chairman of United Hatzalah, having co-founded the International organization with Eli Beer in 2006. He is also the co-founder and Chairman of the African Mission Healthcare Foundation, which supports the work of Christian medical missionaries serving in Africa. As part of that work, he and his wife Erica started the annual Rabbi Erica and Mark Gerson L'Chaim Prize for Outstanding Christian Medical Missionary Service now entering its third year. He is also the co-founder of United Rescue, which is bringing the United Hatzalah model of crowd-sourced volunteer first response to the United States. Mark is also the author of books on intellectual history and on education, and has published articles on subjects including the Biblical Jonah, Frank Sinatra's legacy and the OJ Simpson case in The Wall Street Journal, Commentary, The Weekly Standard and other publications. He is a graduate of Williams College and Yale Law School.

Rabbi Erica Gerson graduated from Amherst College, magna cum laude, and received both Rabbinical ordination and a Masters in Religious Education from Hebrew Union College-Jewish Institute of Religion in 2007. Erica is a member of the Board of Directors of Rodeph Sholom School, a Reform Jewish day school. Erica is also a board member of United Hatzalah of Israel.

Mark and Erica live with their four children in Manhattan.