[1] She received voice training from Judy Bender and sang in her high school's choir.
She attended a vocal summer camp at Oberlin Conservatory of Music, where she later went to college.
[2] After seeing Dehn in a singing competition, Eve Queler of the Opera Orchestra of New York cast her as an understudy in Il Corsaro in 2005.
[3][4] She has been a frequent performer at San Francisco Opera, where she has performed as Musetta in La Boheme, Manon in Manon, Fiordiligi in Così fan tutte, and Arabella in Arabella.
[5][6][7][8] Dehn has also performed on fellow Anoka native Garrison Keillor's radio show, A Prairie Home Companion.