yossi@home:~$ whoami --summary

Yossi Ben Hagai

Senior SRE at Microsoft Sentinel. Previously DevOps leadership at AT&T, CTO of a cybersecurity startup, head of engineering at telco-scale networking shops. I work at the intersection of site reliability, software engineering, security & networking, and applied AI.

senior sre platform eng zero trust k8s · iac llmops · rag · mcp 4 patents ciso

yossi@home:~$ cat highlights.md

4 patents·2 companies co-founded·still shipping

Where I work

Four disciplines, one operator. The most useful work lives on the edges between them - and increasingly, in the middle.

$ man~/work/sre

01 · sre / platform Keep it up. Make it cheap. Tell the story. SLOs · data-engineering · K8s · ADO · FinOps · Azure

$ man~/work/applied-ai

02 · applied AI LLMs with guardrails, evals, and a job to do. RAG · Agents · MCP · evals · AIOps

$ man~/work/software

03 · software Cloud-native, IaC-first, supply-chain-aware. C# · Python · Go · IaC · containers · SDLC

$ man~/work/security

04 · security & networking Zero trust. Real handshakes. Hard guarantees. Zero Trust · Entra · PKI · PenTesting · cross-domain

Track record

High-level only. Per-role detail lives on LinkedIn.

NowSenior SRE @ Microsoft Sentinel - Data & Research Enablement
Before thatAT&T - DevOps Team Lead, Innovation Lead, DevOps / integration leadership
StartupCTO & co-founder @ VADO Security - unidirectional networks / cross-domain data diode
EarlierHead of Engineering at Oasis Communication Technologies · VoIP / backbone / hosting-sec at Internet Gold
SpanAcross telco, enterprise, cybersecurity, and cloud - individual contributor through head-of-engineering

Certified CISOChief Information Security Officer - See-Security College

DevSecOps FoundationsSSDLC, policy-as-code mindset

4 issued / filed patentsunidirectional networking + software-defined sockets

Co-founder × 2built engineering orgs from zero

Patents

On unidirectional / cross-domain networking - the kind of networking where "just retry" is not an option.

Software-Defined Socket ActivationUS 10,523,584
Directing data packets by a virtual switch over a unidirectional mediumWO2018104947A1
Position-based communication routingUS 2018/0063295
System and method for unidirectional communication managementUS 2020/0304600 A1

Now

Senior SRE at Microsoft Sentinel, working on data & research enablement. On my spare time, writing and building small things that keep me fluent in modern runtimes, LLM-tooled operations, and edge architectures - such as netrecon, a correlated-diagnostics tool with an MCP interface.

And, because a personal site should also be a little fun - a small arcade (T-Rex runner, Snake, Tetris, Breakout, Pong, Simon, and an AI-or-Human guessing game).

Yossi Ben Hagai

Where I work

Track record

Patents

Now

Contact