Sr. Principal Windows Systems Engineer

Key Responsibilities

• Lead architecture administration and lifecycle management of Windows Server Active Directory Azure AD/Entra ID and Group Policy.
• Manage and secure Office 365 (Exchange Online SharePoint Online OneDrive Teams Intune M365 Defender).
• Design and enforce identity and access management policies including conditional access MFA SSO and federation.
• Implement and monitor endpoint and server security controlspatching anti-malware EDR/XDR encryption and privileged access management.
• Act as SME for incident response and root cause analysis related to Windows AAD and O365.
• Partner with cybersecurity network and application teams to ensure a Zero Trust security posture.
• Define standards automate administration (PowerShell scripting) and provide mentorship to junior engineers.
• Ensure compliance with frameworks (NIST CIS ISO27001 SOX).

Qualifications

• Bachelors in Computer Science Information Systems or related field (or equivalent experience).
• 12 years hands-on Windows Systems Engineering experience with at least 3 years in a lead role.
• Strong expertise in Azure AD/Entra ID Active Directory Group Policy DNS DHCP PKI.
• Proven experience managing O365 tenant at enterprise scale.
• Deep knowledge of identity security RBAC conditional access federation and hybrid identity models.
• Proficiency in PowerShell and automation.
• Familiarity with security frameworks vulnerability management and incident response.
• Excellent communication and leadership skills.

Working Conditions

The working conditions are those found in typical office environments.

Physical Requirements

Ability to sit for extended periods (typically 68 hours per day); Manual dexterity to operate a keyboard mouse and other office equipment; Ability to communicate clearly in person and over phone/video calls

Safety Requirements

All employees are required to follow the site EHS procedures and Coherent Corp. Corporate EHS standards.

Quality and Environmental Responsibilities

Depending on location this position may be responsible for the execution and maintenance of the ISO 9000 and/or other applicable standards that may apply to the relevant roles and responsibilities within the Quality Management System and Environmental Management System.

CultureCommitment

Ensure adherence to companys values (ICARE) in all aspects of your position at Coherent Corp.:

Integrity Create an Environment of Trust

Collaboration Innovate Through the Sharing of Ideas

Accountability Own the Process and the Outcome

Respect Recognize the Value in Everyone

Enthusiasm Find a Sense of Purpose in Work

Coherent Corp. is an equal opportunity/affirmative action employer. All qualified applicants will receive consideration for employment without regard to sex gender identity sexual orientation race color religion national origin disability protected Veteran status age or any other characteristic protected by law.