Principal Architect, Messaging & Identity Infrastructure

Responsibilities

• Own the architecture and engineering direction for Microsoft Exchange (on-premises and Exchange Online), including hybrid configurations and mail flow.
• Drive email security configurations, including anti-phishing, BEC sensitivity tuning, and Defender for Office 365 policies.
• Lead directory consolidation and decommissioning efforts, including Active Directory and Entra ID integrations.
• Manage the technical workstream for legacy infrastructure sunsetting and large-scale mail migrations.
• Own the enterprise certificate authority strategy and manage the certificate lifecycle for production services.
• Serve as a senior escalation point for production messaging incidents and drive root-cause analysis.
• Maintain accurate CI/EPRID records in ServiceNow and represent the team in Change Advisory Boards (CAB).

Requirements

• 12+ years of enterprise infrastructure experience with deep expertise in Microsoft Exchange and Active Directory.
• Strong working knowledge of Entra ID, hybrid identity, and Microsoft 365 administration at scale.
• Proven track record leading directory consolidations, mail migrations, or post-acquisition integrations.
• Proficiency in Exchange Online PowerShell and AD scripting/automation.
• Hands-on experience with enterprise PKI and certificate lifecycle management.
• Familiarity with ServiceNow/CMDB practices and ITIL processes (RFCs, CAB).
• Excellent written and verbal communication skills for interacting with executives and auditors.

Preferred Qualifications

• Experience managing and steering contractual obligations with managed-service partners (e.g., NTT Data, Microsoft MCS).
• Background in sunsetting legacy data center infrastructure and migrating to modernized cloud or regional environments.
• Familiarity with GRC, SOX-style IT controls, and audit response.
• Exposure to enterprise monitoring tools such as PRTG.

About the Company

HP Inc. is a global leader in technology, dedicated to creating products that reshape the way the world works. We foster an inclusive environment where people can contribute to collective success and drive innovation across the digital landscape.