Familiarity with modern endpoint and mail security tooling: EDR/antivirus/mail filtering platforms (e.g., SentinelOne, Microsoft Defender for Endpoint, Proofpoint, Mimecast, Barracuda), MFA and identity platforms (e.g., Duo, Okta, Entra ID). ·Administer and troubleshoot Microsoft 365 (Exchange Online, Teams, SharePoint, OneDrive), Entra ID, Active Directory, and Intune-managed endpoints — including GPO management and security configurations.