PrincipalArchitect,Messaging&IdentityInfrastructure

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 —