A Cyber Reserve is a pool of trained cybersecurity professionals, often including former military personnel and skilled civilians, who can be mobilized to support national cyber defense during emergencies or large-scale cyber incidents. Similar to military reserves, these experts are not full-time employees but are on standby to provide specialized skills and rapid response when needed. Cyber Reserves help strengthen a nation's ability to respond to cyber threats by supplementing existing government or critical infrastructure teams with additional expertise and resources.