DeCormier Singers was a group of singers conducted by Robert DeCormier (Bob Corman). The members of the group varied over the years. I know that on the Command albums there are some members from the former Belafonte Folk Singers.  Here are some of the names that are found on the  Command albums:

Updated :
mars 24, 2023

Some of the singers:
(not valid for the ABQ6527)
Martin Ambrose
Cathy Brown
Joe Crawford
Cortez Franklin
Douglas Franklin
Lee Harper
Bob Harter - Bass
Vivian Martin
Vicky Morgan
Geraldine Rhoads
Gretchen Rhoads - Soprano
John Wheeler

Musicians:
(not valid for the ABQ6527)
Bobby Byrne - Celeste
Al Casamenti - Guitar
Bob Haggart - Bass
Osie Johnson - Glockenspiel
Tommy Kay - Guitar
Tony Mottola - Classical Guitar
Bobby Rosengarden - Percussion
Irving Schackner - Harmonica
Eric Weissberg - Banjo