Office Infrastructure & Security Management Lead

Position: Office 365 Infrastructure & Security Management Lead
To make electronics, you need chips, wafers, transistors, reticles, and... To make these, you must see, test and manufacture them at scale—faster and better than ever before. That's where KLA comes in. Whether you're early in your career or an experienced professional, you'll solve complex challenges, work alongside brilliant minds and help shape the future of technology.

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 DoIn 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 Leadership Own 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 Services Lead 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 Program Own 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 Security Microsoft Defender for Office 365

Advanced Threat Protection (ATP)
Anti-phishing policies

Safe Links Safe Attachments Impersonation protection

Monitor and respond to email-based threats.

Partner with Cybersecurity teams to investigate phishing incidents and threat campaigns.

Email Security Administration Serve as technical owner for the email security platform.

Manage:

Secure Email Gateway (SEG)
TAP (Targeted Attack Protection)
Email DLPThreat Intelligence Phishing ProtectionURL Defense Email Encryption Optimize email filtering to reduce false positives and false…