Office 365 Infrastructure

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Group/DivisionKLA's IT group supports business growth and productivity by connecting people, process and technology around the world. We work to improve the technology that drives our business to thrive and focus on empowering employee use of technology. This integrated approach to customer service, creativity and technological excellence enhances employee productivity, business analytics and process excellence.

What You'll Do
In this role, you will play a key part in advancing business priorities by delivering high-impact work across your area of expertise.
The position of Microsoft 365 Infrastructure & Security Management is responsible for the strategic direction, operational excellence, security posture, and lifecycle management of the organization's Microsoft 365 ecosystem. This role leads the administration, engineering, governance, security, and continuous improvement of Microsoft 365 services with deep skills in Exchange Online.
The individual will be accountable for ensuring a secure, highly available, scalable, and compliant Microsoft 365 environment while driving enterprise email security initiatives through Proofpoint, Microsoft Defender, anti-phishing programs, threat prevention, and tenant governance.
This role works closely with Cybersecurity, Infrastructure Operations, Enterprise Architecture, Compliance, Risk Management, and business stakeholders to deliver secure modern workplace services for a global enterprise.
Microsoft 365 Infrastructure Platform LeadershipOwn the strategy, roadmap, architecture, and operations of the Microsoft 365 platform.
Lead Microsoft 365 tenant administration and governance.
Ensure platform availability, performance, scalability, and reliability.
Define operational standards, policies, and best practices for Microsoft 365 services.
Manage service lifecycle planning, upgrades, feature adoption, and platform optimization.
Develop and maintain M365 governance and operating models.
Exchange Online Administration & Messaging ServicesLead global administration of Microsoft Exchange Online.
Manage email routing, mail flow, connectors, transport rules, and SMTP infrastructure.
Oversee mailbox provisioning, migrations, retention, archiving, and lifecycle management.
Manage hybrid Exchange environments when applicable.
Ensure email platform health, performance, uptime, and service availability.
Troubleshoot complex messaging issues and coordinate escalations with Microsoft support.
Establish standards for email security, compliance, and operational governance.
Email Security & Anti-Phishing ProgramOwn enterprise email security strategy and operations.
Lead phishing prevention, business email compromise (BEC) protection, and email threat management initiatives.
Drive troubleshooting, implementation and optimization of:Proofpoint Email SecurityMicrosoft Defender for Office 365Advanced Threat Protection (ATP)Anti-phishing policiesSafe LinksSafe AttachmentsImpersonation protectionMonitor and respond to email-based threats.
Partner with Cybersecurity teams to investigate phishing incidents and threat campaigns.
Email Security AdministrationServe as technical owner for the email security platform.
Manage:Secure Email Gateway (SEG)TAP (Targeted Attack Protection)Email DLPThreat IntelligencePhishing ProtectionURL DefenseEmail EncryptionOptimize email filtering to reduce false positives and false negatives.
Implement email authentication standards including:SPFDKIMDMARCDomain ProtectionCreate executive reporting on email threat trends and security metrics.
Microsoft 365 Security & CompliancePartner with Cybersecurity teams to strengthen M365 security posture.
Manage Microsoft security controls including:Microsoft Defender for Office 365Microsoft Defender XDRMicrosoft PurviewConditional AccessData Loss Prevention (DLP)Information ProtectionInsider Risk ManagementLead security assessments and remediation efforts.
Ensure compliance with regulatory and corporate security requirements.
Implement Zero Trust security principles across Microsoft 365 services.
Tenant Administration & Identity ServicesAdminister Microsoft 365 tenant services and configurations.
Partner with Identity teams supporting:Microsoft Entra IDSingle Sign-On (SSO)Federation ServicesMultifactor Authentication (MFA)Conditional AccessIdentity GovernanceManage tenant security baselines and configuration standards.
Maintain tenant health, security reviews, and governance processes.
Infrastructure & Endpoint IntegrationOversee integration between Microsoft 365 and enterprise infrastructure services.
Support:Microsoft IntuneEndpoint ManagementDevice ComplianceAzure ServicesEnterprise Authent