M365 Level-3 Security Admin

Our Microsoft 365 tenant needs top-tier, level-3 attention with security and compliance sitting firmly in the driver’s seat. Day to day, I will rely on you to own security incident response across the entire Microsoft 365 stack—digging into alerts from the Security Center, triaging, containing and documenting every incident so our environment stays audit-ready.

Alongside that front-line security work, I still have a steady flow of core administration that can’t stall. New hires, departures and role changes mean user accounts and licences have to be created, removed or reassigned promptly, and Exchange settings must stay aligned with policy. I currently handle these items through the Microsoft 365 Admin Center and PowerShell, so you should be equally comfortable in both.

Deliverables
• Timely investigation & resolution of all Microsoft 365 security alerts, with clear incident reports
• Accurate user account creation/deletion and licence assignment/revocation within agreed SLAs
• Ongoing Exchange Online administration (mailbox policies, transport rules, shared mailbox upkeep)
• Monthly summary highlighting incidents handled, actions taken and any recommended hardening steps

If you have proven experience operating at level 3 within Microsoft 365, including rapid incident response and solid PowerShell automation for user management, let’s keep our tenant secure and running smoothly together.