She was a regular contributor to National Public Radio's Morning Edition program.
She joined the faculty of the Annenberg School for Communication at the University of Southern California in August 2003 as an assistant professor of journalism, and is now serves a professor emerita of journalism.
As part of the Nightline team, she received an Alfred I. duPont-Columbia University Award for coverage of the 1992 Los Angeles riots and an Emmy Award for coverage of the O. J. Simpson case.
She has written a book entitled Now This: Radio, Television—and the Real World (2000).
Muller facilitated workshops for the Alan Alda Center for Communicating Science.