Senior Network & Email Security Engineer – Cyber Defense Specialist (5+ Years)

We are seeking a highly skilled Senior Network & Email Security Engineer to join a leading Big 5 consulting firm, supporting a mission-critical, enterprise-scale environment within a regulated sector. This role is responsible for maintaining a hardened network perimeter and securing enterprise email systems, ensuring operational excellence, audit readiness, and stability across all security controls. You will own day-to-day operations, incident response, and change governance across network and email security platforms.