Email Security Engineer - Contract
Core
Design, implement, and validate outbound email security controls and migrate legacy systems to Mimecast for Optus.
Role type
Contract Email Security Engineer
Builds
Outbound email security controls and mail flow integrity
Domain
Cybersecurity / Email Security
Deliverable
production ML models | product features | dashboards & analysis | research | client delivery | infrastructure | physical/clinical work
Required skills
Email security administration, outbound mail-flow troubleshooting, email journaling implementation, policy management, Microsoft 365/Exchange Online administration, legacy email platform migration, email authentication protocols, technical documentation
Preferred skills
Trend Micro platform experience, SPF/DKIM/DMARC configuration, SMTP/DNS management
Technologies
Mimecast, Microsoft 365, Exchange Online, Trend Micro, SPF, DKIM, DMARC, SMTP, DNS
Responsibilities
Execute configuration and engineering changes in a controlled manner, Coordinate testing with technical teams and business stakeholders, Develop runbooks, technical procedures, support models and knowledge-transfer materials, Monitor post-change outcomes and recommend further tuning, Escalate issues early and drive actions through to completion, Design, implement and validate the Mimecast outbound mail flow, Review outbound routing, controls, policies, authentication and delivery behaviour, Identify and close gaps across data protection, malware, impersonation, URL and policy enforcement controls, Troubleshoot mail-flow issues across Mimecast, Microsoft 365 and downstream or third-party systems, Support testing, cutover planning, monitoring and rollback readiness, Map current Trend Micro email security capabilities, integrations, dependencies and traffic flows, Define the migration and decommissioning sequence in coordination with the Mimecast target state, Remove or retire legacy configurations, rules and integrations safely, Validate that required protection and mail-flow outcomes remain in place after each change, Support defect resolution, rollback planning, evidence capture and final closure of the decommissioning work
Seniority
Mid-level, hands-on IC