Morten Johannes Lauridsen (born February 27, 1943) is an American composer. A National Medal of Arts recipient (2007), he was composer-in-residence of the Los Angeles Master Chorale (1994–2001) and has been a professor of composition at the University of Southern California Thornton School of Music for more than 40 years.
Morten Johannes began teaching at the USC Thornton School of Music before 1979.
If he has been a teacher for at least 40 years he would of began teaching there before 1979.