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Family 03

DevOps & Infrastructure

You run private platforms without relying on the public cloud: overlay networks, dual-site PostgreSQL replication, reproducible device images, server rooms and cryptographic key management.

Role framework

Roles in this family

SRE – Private Network, Disaster Recovery & Updates

Private and overlay networking, PostgreSQL replication and drilled dual-site DR, signed client updates, closed management planes.

ExpertLinuxPostgreSQL replicationOverlay networkingDR

SRE – Endpoint Factory

Golden images for phones and desktops, fleet enrolment, serial traceability, two-person checks.

SeniorGolden imagesAOSPZero-touchBash / Python

Data Center Engineer

Building and running server rooms: racks, redundant power and cooling, physical network, monitoring and inventory.

SeniorRacks & cablingUPS / coolingOut-of-bandMonitoring

Cryptographic Key Ceremony Engineer

Key generation and rotation ceremonies (HSM, secret sharing), scripts, witnesses, evidence and offline storage.

ExpertHSMShamir / M-of-NPKIAir-gapped

Machine Learning Engineer – Model Serving & GPU Ops

Private inference: llama.cpp-class runtimes, CUDA drivers, quantisation, signed weight import and metrics that never log prompts.

Mid-SeniorCUDAllama.cpp / vLLMQuantizationMonitoring

Security Architect (Delivery)

Security architecture applied to delivery: threat model, isolation, key and secret management, design reviews and evidence before each release.

ExpertThreat modellingZero trustPKI / HSMSecure SDLC

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