Alternate COMSEC CustodianCreated OnFebruary 8, 2018Last Updated OnFebruary 8, 2018Views18 You are here: KB Home Definitions Definitions A-B Alternate COMSEC Custodian < BackIndividual designated by proper authority to perform the duties of the COMSEC custodian during the temporary absence of the COMSEC custodian. SOURCE: CNSSI-4009