Glass has worked in public radio for over 20 years. He started out as an intern at National Public Radio. He was a reporter and host on several NPR programs, including Morning Edition and All Things Considered.
Since 1995 he is host and producer of the radio show, This American Life, from WBEZ. The show went national in June 1996 and is distributed by Public Radio International. It reaches over 1.4 million listeners weekly.