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Job Summary
We have an exciting opening for a Senior O365 Messaging Engineer to join our global IT team and support the delivery of O365 messaging solutions for our clients and internal stakeholders. You will be responsible for supporting the integral O365 messaging service, ensuring its availability, performance, security, and compliance. You will have responsibility to work with our third-party resources, ensuring they meet service level agreements and quality standards. You will support messaging projects, such as tenant migrations, client transitions, and integration work including cross-tenant coexistence. You will provide guidance on messaging design and implementation. And you will act as a point of escalation for support related issues for troubleshooting O365 messaging features and integrations.
Key Responsibilities
Support administration and management of the O365 messaging infrastructure, including both Exchange Online and on-premises environments, to ensure availability and performance.
Provide technical expertise and guidance in O365 messaging, primarily focused on Exchange.
Responsible for Proofpoint and Defender configuration and internal alignment on best practice operations.




Assist with regular management reporting and provide telemetry to track service health and progress against operational goals.
Work with third-party providers to ensure O365 messaging services are delivered in alignment with service level agreements and quality expectations.
Support cost optimization efforts and help manage the O365 messaging budget in line with organizational targets.
Ensure the messaging infrastructure is maintained according to business requirements, industry standards, and best practices.
Follow and enforce O365 messaging policies, procedures, and governance frameworks.
Troubleshoot and resolve complex or escalated O365 messaging incidents, problems, changes, and requests, acting as an escalation point for support issues.
Provide technical support and guidance to end users and stakeholders for O365 messaging-related issues.
Participate in O365 messaging projects and initiatives, such as tenant migrations, integrations, and service improvements, from planning through to execution.
Creates, tests and manages scripts as needed for management and administration
Performs other duties as assigned/required
Attend Project and management meetings, communicating with technical and non-technical staff at all levels.
Qualifications and Requirements
Bachelor's degree in Computer Science, Information Technology, or related field.




At least 7 years of experience in O365 messaging engineering and administration.
Strong knowledge of Exchange Online (Microsoft 365) administration and hybrid Exchange deployments including Microsoft Exchange Server **) architecture, installation, and upgrades
Strong knowledge of mail flow design, connectors, transport rules, and routing
Expert knowledge of
Microsoft Defender for Office 365 , Microsoft Purview Suite and Proofpoint including Mail Protection, TAP, EFD, threat analysis, eDiscovery, retention, DLP & Legal hold processes
Strong knowledge and skills in O365 Email security (anti-spam, anti-malware, phishing protection), role-based access control (RBAC), TLS, certificates
Strong knowledge of email transport security including DMARC, DKIM, SPF and how these can effect mail delivery
Experience with cross‐tenant migrations and coexistence strategies including integration with third‐party email security, archiving & Migration tools (e.g MigrationWiz, AvePoint Fly, Quest QMM)
Experience with Intune - Mobile Device Management, including understanding of ABM, Google Enterprise, Compliance , Configuration and App protection policies
Knowledge of Teams, SharePoint, and OneDrive dependencies on Exchange
Knowledge of capacity planning, performance tuning and patch management
Experience with monitoring tools and alerting (Microsoft and third‐party)
Strong Scripting skills i.e PowerShell (Exchange, Microsoft 365, Azure AD modules)
Strong communication, collaboration and stakeholder management skills, both verbal and written.
Strong analytical, troubleshooting and critical thinking skills using logs, message traces, and PowerShell diagnostics
Preferen

📌 Messaging Senior Engineer (México)
🏢 Jll
📍 México