Jefferson played mandolin in several bluegrass bands including Randall Collins, Curtis Blackwell & Dixie Bluegrass Boys, the Charlie Moore & the Dixie Partners, and Northern Border band, whom he joined in 1981.
He played on the Curtis Blackwell, Randall Collins & Dixie Bluegrass Boys’ "Shadows of Time" LP that County Records (County 728) released in 1970, as well as "Gospel Time with Charlie Moore" (Vetco LP-3013), "Fiddler" (Old Homestead OHS-90052), "Tennessee Mountain Fiddle" (OHS-90067), "Country Music Memories, Vol. 1" (OHS-90134), "Country Music Memories, Vol. 2" (OHS-90135) and "Wheeling" (OHS-90075). His tenor vocal and mandolin is also featured on "Bluegrass Legends Together" (Wango LP-112), a record that paired the talents of Don Reno as well as Charlie Moore.