• Execute Windows Server upgrades (in-place and migration-based) following approved implementation and rollback plans • Perform Windows OS security patching aligned to maintenance schedules and vulnerability remediation targets • Support NERC CIP compliance by following required procedures and preserving audit evidence • Coordinate planned outages with operations, cybersecurity, application, and infrastructure teams • Create and execute change requests in accordance with formal change management processes • Perform post-maintenance validation (system health, services, logs, application availability) • Produce detailed documentation for all activities to ensure audit readiness and traceability • Track, escalate, and support resolution of issues encountered during upgrade and patch cycles