Office 365 Infrastructure & Security Management Lead

Company Overview

KLA is a global leader in diversified electronics for the semiconductor manufacturing ecosystem. Virtually every electronic device in the world is produced using our technologies. No laptop smartphone wearable device voice-controlled gadget flexible screen VR device or smart car would have made it into your hands without us. KLA invents systems and solutions for the manufacturing of wafers and reticles integrated circuits packaging printed circuit boards and flat panel displays. The innovative ideas and devices that are advancing humanity all begin with inspiration research and development. KLA focuses more than average on innovation and we invest 15% of sales back into R&D. Our expert teams of physicists engineers data scientists and problem-solvers work together with the worlds leading technology providers to accelerate the delivery of tomorrows electronic devices. Life here is exciting and our teams thrive on tackling really hard problems. There is never a dull moment with us.

Group/Division

The Information Technology (IT) group at KLA is involved in every aspect of the global business. ITs mission is to enable business growth and productivity by connecting people process and technology. It focuses not only on enhancing the technology that enables our business to thrive but also on how employees use and are empowered by technology. This integrated approach to customer service creativity and technological excellence enables employee productivity business analytics and process excellence.

Job Description/Preferred Qualifications

The position of Microsoft 365 Infrastructure & Security Management is responsible for the strategic direction operational excellence security posture and lifecycle management of the organizations 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 DLP

  • Threat Intelligence

  • Phishing Protection

  • URL Defense

  • Email Encryption

• Optimize email filtering to reduce false positives and false negatives.

• Implement email authentication standards including:

  • SPF

  • DKIM

  • DMARC

  • Domain Protection

• Create executive reporting on email threat trends and security metrics.

Microsoft 365 Security & Compliance

• Partner with Cybersecurity teams to strengthen M365 security posture.

• Manage Microsoft security controls including:

  • Microsoft Defender for Office 365

  • Microsoft Defender XDR

  • Microsoft Purview

  • Conditional Access

  • Data Loss Prevention (DLP)

  • Information Protection

  • Insider Risk Management

• Lead 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 Services

• Administer Microsoft 365 tenant services and configurations.

• Partner with Identity teams supporting:

  • Microsoft Entra ID

  • Single Sign-On (SSO)

  • Federation Services

  • Multifactor Authentication (MFA)

  • Conditional Access

  • Identity Governance

• Manage tenant security baselines and configuration standards.

• Maintain tenant health security reviews and governance processes.

Infrastructure & Endpoint Integration

• Oversee integration between Microsoft 365 and enterprise infrastructure services.

• Support:

  • Microsoft Intune

  • Endpoint Management

  • Device Compliance

  • Azure Services

  • Enterprise Authentication Platforms

• Collaborate with Infrastructure Operations to ensure service resiliency and business continuity.

Operations & Service Management

• Lead day-to-day service operations for the Microsoft 365 environment.

• Establish KPIs SLAs operational dashboards and service reporting.

• Drive incident problem change and capacity management processes.

• Manage vendor relationships including Microsoft and Proofpoint.

• Develop automation strategies for platform administration and support activities.

• Ensure alignment with ITIL and ServiceNow processes.

Risk Management & Governance

• Develop governance controls for Microsoft 365 services.

• Conduct platform risk assessments and remediation planning.

• Support security audits compliance reviews and regulatory requirements.

• Maintain disaster recovery and business continuity plans.

• Drive continuous service improvement initiatives.

Minimum Qualifications

Doctorate (Academic) Degree and related work experience of 3 years; Masters Level Degree and related work experience of 6 years; Bachelors Level Degree and related work experience of 8 years

Base Pay Range: $111100.00 - $188900.00 Annually

Primary Location: USA-MI-Ann Arbor-KLA

KLAs total rewards package for employees may also include participation in performance incentive programs and eligibility for additional benefits including but not limited to: medical dental vision life and other voluntary benefits 401(K) including company matching employee stock purchase program (ESPP) student debt assistance tuition reimbursement program development and career growth opportunities and programs financial planning benefits wellness benefits including an employee assistance program (EAP) paid time off and paid company holidays and family care and bonding leave.

Interns are eligible for some of the benefits listed. Our pay ranges are determined by role level and location. The range displayed reflects the pay for this position in the primary location identified in this posting. Actual pay depends on several factors including state minimum pay wage rates location job-related skills experience and relevant education level or training. We are committed to complying with all applicable federal and state minimum wage requirements where applicable. If applicable your recruiter can share more about the specific pay range for your preferred location during the hiring process.

KLA is proud to be an Equal Opportunity Employer. We will ensure that qualified individuals with disabilities are provided reasonable accommodation to participate in the job application or interview process to perform essential job functions and to receive other benefits and privileges of employment. Please contact us at or at 1- to request accommodation.

Be aware of potentially fraudulent job postings or suspicious recruiting activity by persons that are currently posing as KLA employees. KLA never asks for any financial compensation to be considered for an interview to become an employee or for equipment. Further KLA does not work with any recruiters or third parties who charge such fees either directly or on behalf of KLA. Please ensure that you have searched KLAs Careers website for legitimate job postings. KLA follows a recruiting process that involves multiple interviews in person or on video conferencing with our hiring managers. If you are concerned that a communication an interview an offer of employment or that an employee is not legitimate please send an email to to confirm the person you are communicating with is an employee. We take your privacy very seriously and confidentially handle your information.