Email Security Engineer (Hybrid)

About the role We are looking for an experienced engineer who will be responsible for the design, implementation, operation, optimization, and continuous improvement of enterprise technology solutions and services. The role ensures reliability, security, performance, compliance, and scalability while supporting business objectives and transformation initiatives. The engineer applies strong technical expertise, operational excellence, risk management, and architectural best practices to deliver resilient, efficient, and future-ready solutions across various technology domains. Key responsibilities Lead the hands-on administration, configuration, policy tuning, optimization, and troubleshooting of Proofpoint and Microsoft Defender for Office 365, including email threat protection, mail flow, quarantine, allow/block controls, alerting, reporting, and platform integrations. Govern the end-to-end email service lifecycle, including mailbox management, access controls, retention policies, and platform standards. Develop and enforce enterprise email security controls to protect against phishing, malware, spoofing, business email compromise (BEC), and emerging cyber threats. Oversee email authentication, mail flow architecture, routing policies, and secure communications across cloud, hybrid, and integrated environments. Lead email threat investigations and response activities involving phishing, BEC, impersonation, spoofing, malicious URLs and attachments, compromised accounts, user-reported messages, and other email-borne threats, including threat hunting, campaign analysis, remediation, and root cause analysis. Ensure compliance with regulatory, legal, and corporate requirements through effective implementation of data protection, archiving, retention, eDiscovery, and governance controls. Drive platform lifecycle management, including capacity planning, performance optimization, vulnerability management, patching, upgrades, and technology modernization initiatives. Serve as the senior subject matter expert for messaging and collaboration technologies, partnering with cybersecurity, infrastructure, compliance, and business stakeholders. Manage strategic vendor relationships, service providers, and technology partners to ensure service quality, operational efficiency, and continuous improvement. Develop operational standards, technical documentation, service metrics, and strategic roadmaps while promoting automation, innovation, and service excellence. About you Bachelor's degree in information technology, Computer Science, Computer Engineering, Electronics Engineer, Cybersecurity, or a related discipline, or equivalent industry experience. 5+ years of experience managing enterprise messaging platforms and email security technologies, Microsoft Exchange Online, Microsoft 365, Outlook, and Proofpoint administration. Hands-on enterprise experience administering and supporting Proofpoint and Microsoft Defender for Office 365, including configuration, policy management, tuning, troubleshooting, threat investigation, and remediation. Strong understanding of enterprise email security technologies and protocols, including SMTP, DNS, MX records, SPF, DKIM, DMARC, TLS, mail routing, connectors, relays, email headers, and message tracing. Demonstrated ability to troubleshoot complex email security and mail-flow issues across Exchange Online, Proofpoint, Microsoft Defender for Office 365, DNS, SMTP, and integrated security platforms. Microsoft Certified: Messaging Administrator Associate. Microsoft 365 Certified: Security Administrator Associate. Certified Information Systems Security Professional (CISSP), CompTIA Security+, or equivalent security certification. Experience with Microsoft Defender for Office 365, Microsoft Purview, Exchange Hybrid deployments, and email security gateways. Knowledge of regulatory frameworks and compliance standards such as ISO 27001, NIST, GDPR, HIPAA, or similar. Effective communication that is both written and spoken with great follow-up skills. About us Global Delivery Services refers to EY's worldwide network of service delivery centers. The GDS team plays an important role in EY's strategy by ensuring effective support to EY's growth agenda. Our journey started in 2002 with approximately 200 people. Today we stand at 80,000+ professionals in ten locations around the world. We operate in Argentina, China, Hungary, India, Philippines, Poland, Sri Lanka, Mexico, Spain and the United Kingdom. EY is building a better working world by creating new value for clients, people, society and the planet, while building trust in capital markets. Enabled by data, AI and advanced technology, EY teams help clients shape the future with confidence and develop answers for the most pressing issues of today and tomorrow. EY teams work across a full spectrum of services in assurance, consulting, tax, strategy and transactions. Benefits Future-focused skills development and world-class experiences. Flexible environment and empowerment in a diverse and inclusive culture of globally connected teams. Continuous learning opportunities to build new skills, take on leadership roles, and connect and grow through mentorship. Premium benefits encompassing exclusive health and wellness packages, enticing rewards, and cutting-edge learning opportunities.