Owns enterprise IT infrastructure and end-user computing across on-premises, cloud, identity, networking, endpoints, and segmented environments. Responsibilities include Azure/AWS administration, systems hardening, patching, vulnerability remediation, endpoint and identity management, backups, disaster recovery, audit evidence, incident response, asset lifecycle, documentation, automation, and advanced technical support. The role independently drives infrastructure modernization, security compliance, operational resilience, and controlled access for a security-sensitive entity.