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 HPs acquisitions (including Poly / Plantronics). ThePrincipal Architect Messaging & Identity Infrastructureis 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 Youll Do

Messaging & Email Platform

• Own architecture and engineering direction forMicrosoft Exchange Server (on-premises) and Exchange Online including the corp-domain Exchange estate hybrid configuration and mail flow.

• Driveemail 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.

• UseExchange Online PowerShellto 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

• Leaddirectory consolidation and decommissioning including the in-flight Poly AD decommission scope coordination with GRC/audit and engineering-team retention exceptions.

• Partner with theIdentity Governance & Administration (IGA)team on access reviews account lifecycle and Entra connections.

M&A Integration & Legacy Sunset

• Lead the technical workstream forHPNOW / ATM Sunset the multi-year migration off the Yokohama-hosted AD and Exchange environment including architectural review scope definition and transition-support planning with NTT Data.

• Define the post-Yokohama target state for AD/Exchange functions and lead the re-architecture where existing capabilities are insufficient.

• Driveenterprise application cleanup(working with the apps team to retire orphaned tenants and unused services).

PKI Servers & Adjacent Infrastructure

• Own thecertificate authoritystrategy with Entrust (including the new Austin DC CA replacing the unsupported legacy CA) and certificate lifecycle for production services such as Poly Manufacturing.

• Provide architectural input on adjacent infrastructure: server inventory and backup posture monitoring (PRTG migration) and network/NNI changes routed through the Network CAB.

• Maintain accurateCI/EPRID records in ServiceNow / HP NOWfor the messaging directory and server estate and partner with operations to keep RFC approvals unblocked.

Governance Risk & Compliance

• Execute and close outGRC controlsaffecting the messaging and directory estate on schedule.

• Represent the team inChange Advisory Boards(Network CAB etc.) and architecture reviews.

• Partner with Microsoft Mission Critical Services for M365 on platform health escalations and roadmap alignment.

What Youll Bring

Required

• 12 years of enterprise infrastructure experience with deep expertise inMicrosoft Exchange (on-prem and Exchange Online / M365)andActive Directory.

• Strong working knowledge ofEntra ID hybrid identity and Microsoft 365 administration at enterprise scale.

• Demonstrated track record leadingdirectory consolidations mail migrations or post-acquisition integrationsin a large multi-domain environment.

• Fluent inExchange Online PowerShelland AD scripting / automation.

• Hands-on experience withenterprise PKI(certificate authorities certificate lifecycle vendor management Entrust or equivalent).

• Familiarity withServiceNow / CMDBpractices (CIs EPRIDs RFCs CAB processes).

• Strong written and verbal communication comfortable representing the team to executives auditors and external partners.

Preferred

• Experience operating withmanaged-service partners(NTT Data Microsoft Premier/MCS or equivalents) and steering contractual obligations.

• Background sunsetting legacy data center infrastructure and migrating to modernized US-region equivalents.

• Familiarity withGRC / SOX-style IT controlsand audit response.

• Exposure to enterprise monitoring (PRTG or similar) and network change processes.

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Equal Opportunity Employer (EEO) -

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