KOA manager (KOAM) definition in Computer Security terms:
Definition(s): An external operational management role that is responsible for the operation of a key management infrastructure operating account (KOA) that includes all distribution of KMI key and products from the management client (MGC) to the end cryptographic units (ECUs) and fill devices, and management and accountability of all electronic and physical key, and physical COMSEC materials from receipt and/or production to destruction or transfer to another KOA. (Similar to an electronic key management system (EKMS) Manager or COMSEC Account Manager).
Source(s): CNSSI 4009-2015 (CNSSI 4005)
reference: CSRC Glossary