Job Description • Manager Security, Cryptography & Protocol Engineering
Manager Network Security, Cryptography & Protocol Engineering

5-9 years experience • • 25% travel

About the role.
We are looking for a Manager who lives at the intersection of network protocols and applied cryptography. This is a
deeply hands-on role you will spend most of your time in the lab and in the code: reading RFCs, extending open-source stacks, wiring
up IPsec, MACsec, WireGuard, TLS 1.3 and PQC overlays, and hardening the security of everything you touch. Not an architect-review
role; a build, break, benchmark and ship role with real ownership of what runs in production. The role sits within Strategy & Innovations
at Tata Communications and reports into the Network Architecture leadership.

Key responsibilities
• Own security and cryptography depth develop and demonstrate a first-principles understanding of the primitives (symmetric

ciphers, hashes, KEMs, signatures, PQC) and of the protocols that use them (TLS 1.3, IPsec, MACsec, WireGuard, QKD key delivery).
Know when to apply which primitive,



and why.
• Experiment with security protocols hands-on build, break, benchmark and tune IPsec (IKEv2, ESP), MACsec (802.1AE),

WireGuard, TLS variants and PQC overlays in the lab; capture what works, what breaks, and what to change; publish findings back
to the team.
• Implement and extend network protocols read IETF / IEEE RFCs end-to-end and turn them into production-quality code in

C, C++, Rust or Python. Add features and capabilities to existing protocol implementations (routing daemons, tunnelling stacks,
control planes, overlays).
• Improve the software stack profile, patch and harden open-source or in-house network / security stacks (strongSwan,

wpa_supplicant, kernel netfilter, libsodium, liboqs, and equivalents). Own the quality bar for the code you ship; contribute
upstream where it makes sense.
• Design security into the code, not around it — apply mutual authentication, key rot

📌 Manager (Bengaluru)
🏢 Tata Communications
📍 Bengaluru