Network security engineers secure the perimeter and the internal segmentation behind it — firewalls, VPNs, zero-trust access and the policy that governs traffic between zones. This is the better half of the networking market: demand is stronger than for general network administration and the candidate pool is smaller, because it requires security depth on top of routing and switching. Indian hiring comes from BFSI, telecom and managed security service providers, with steady demand in Pune and Mumbai.