Lead Enterprise Systems Engineer M365

The Opportunity

We are looking for a Senior Enterprise Systems Engineer to join a global technology infrastructure team. This is a senior hands-on role covering both Microsoft 365/cloud and traditional on-premises infrastructure.

The ideal candidate will have strong experience across M365, Azure/Entra ID, Windows Server, Active Directory and VMware, and be comfortable operating as an L3/L4 escalation point and technical SME.

Key Responsibilities

• Design, implement and support enterprise infrastructure across Windows Server, VMware, Azure and Microsoft 365.

• Manage and troubleshoot Active Directory, DNS, DHCP, GPO, DFS, File Services and Exchange.

• Manage Microsoft 365, Entra ID, Exchange Online, Defender and Conditional Access.

• Manage VMware vSphere, Horizon VDI and Azure Virtual Desktop environments.

• Lead resolution of complex P1/P2 incidents, root-cause analysis and permanent remediation.

• Automate infrastructure operations using PowerShell, Microsoft Graph API and SCCM.

• Support Terraform, Azure DevOps and Infrastructure-as-Code initiatives.

• Manage PKI/certificates, security hardening, backup and disaster recovery.

• Act as a technical SME, mentor engineers and contribute to infrastructure architecture and roadmap discussions

Key Skills & Experience

• At least 5 years of enterprise infrastructure experience, preferably within financial services or a regulated environment.

• Strong hands-on experience across both M365 and on-premises infrastructure.

• Strong knowledge of Microsoft 365, Entra ID, Exchange Online, Defender and Conditional Access.

• Strong Windows Server and Active Directory experience.

• Hands-on VMware vSphere/Horizon experience; Azure Virtual Desktop is advantageous.

• Experience with PowerShell, Microsoft Graph API and SCCM.

• Exposure to Terraform, Azure DevOps, PKI, backup and DR.

• Strong troubleshooting and problem-solving skills.

• Experience working with global/follow-the-sun teams is preferred.

• Excellent English communication skills.