IT engineer Principal Architect Active Directory O365 Description - Job Description - Principal Architect, Messaging & Identity Infrastructure
Department: IT
Department: Connected Digital Experiences
Location: HP Inc. (Mexico, Guadalajara)
Level: Principal / Technical Architect (individual contributor)
About the Role
HP runs one of the largest enterprise messaging and identity environments in the technology industry, spanning Microsoft Exchange (on-premises and Exchange Online), Active Directory, Entra ID, and the directory and PKI footprint inherited through HP's acquisitions (including Poly / Plantronics). The Principal Architect, Messaging & Identity Infrastructure is the senior technical owner for this estate - driving its operation, security posture, M&A; integration, and the multi-year sunset of legacy environments such as the ATM / HPNOW Yokohama infrastructure.
This is a like-for-like backfill for a long-tenured Principal Architect on the Connected Digital Experiences team. The role is hands-on and deeply technical,



with broad cross-organizational influence across IT Operations, Information Security, GRC, and external managed-service partners (NTT Data, Entrust, Microsoft Mission Critical Services for M365).
What You'll Do
Messaging & Email Platform
- Own architecture and engineering direction for Microsoft Exchange Server (on-premises) and Exchange Online , including the corp-domain Exchange estate, hybrid configuration, and mail flow.
- Drive email security configuration - BEC sensitivity tuning, anti-phishing, and Defender for Office 365 policies - and partner with managed-service vendors on day-to-day operational changes.
- Use Exchange Online PowerShell to script, audit, and operate the environment at scale (e.g. mailbox configuration, auto-reply policies, recipient management).
- Serve as senior escalation point for production incidents involving messaging - drive root-cause analysis and incident closure reporting.

Active Directory & Entra ID
- Lead di

📌 IT engineer Principal Architect Active Directory (San Pedro Tlaquepaque)
🏢 HP..
📍 San Pedro Tlaquepaque