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.