Resuming his professional career after the war, he toured extensively as a concert pianist and formed successful partnerships with the Griller Quartet and the Amadeus Quartet.
An equally talented classical bassist, Mosher occasionally performed with the Griller Quartet string ensemble in appearances in the San Franciso area, including appearances on KQED.
Kronos Quartet | Modern Jazz Quartet | Arditti Quartet | Alban Berg Quartet | Pacifica Quartet | Juilliard String Quartet | Fine Arts Quartet | Emerson String Quartet | quartet | Amadeus Quartet | Vermeer Quartet | Pro Arte Quartet | Modern Folk Quartet | FLUX Quartet | Belcea Quartet | Ying Quartet | Turtle Island Quartet | Quartet on the Middle East | Petersen Quartet | Ethel (string quartet) | Ciompi Quartet | Smith Quartet | Sacconi Quartet | Quartet | London String Quartet | Homer's Barbershop Quartet | Hollywood String Quartet | Australian String Quartet | Zoellner Quartet | Time Quartet |