Jefferson used to work as a freelance producer for the statewide public radio program The California Report. He reported from the Central Valley Bureau office of KQED Public Radio and he produced sound recordings for NPR and other public radio outlets.

• Fresno Teacher Belongs to a Long Line of Central Valley Poets (The California Report) – Listen
• Stories of Hunger, Onstage (The California Report) – ListenRead blog
• The Giving State: Guitar Hero (The California Report) – ListenRead blog
• Central Valley Label Embraces the Cassette (The California Report) – ListenRead blog
• Anthology Collects Poems, Stories by Hmong Americans (The California Report) – ListenRead blog

Jefferson used to volunteer as a disc jockey and radio host for the Evening Eclectic program on 90.7 KFSR, the Fresno State radio station, where he frequently interviewed both local and national musicians.

Interview: Evening Eclectic on 90.7 KFSR
Aaron Espinoza and Jason Lytle of Admiral Radley (July 2010)

Interview: Evening Eclectic on 90.7 KFSR
Kathy Foster of The Thermals (September 2009)