Tal Sabadia — Senior Linux & Infrastructure Engineer

About

I like seeing how the whole system fits together.

I work across the layers where infrastructure problems actually happen: operating systems, applications, network paths, delivery platforms, monitoring, and the automation that connects them.

Outside production work, I build and experiment with useful technology—automation, observability, AI-agent workflows, and occasional web interfaces when they solve a real problem. I am interested in the intersection of systems, design, and turning technical ideas into things that are clear and practical.

Languages

What I do

Infrastructure, from the OS up.

Linux, automation, monitoring, migrations, and the messy parts between them.

01

Linux & Production Infrastructure

Own Linux estates and production operations with a focus on stability, clarity, and maintainable operating practices.

02

Infrastructure Automation

Turn repeatable operational work into dependable tooling, provisioning flows, and automation using pragmatic scripts and configuration management.

03

Observability & Investigation

Build useful monitoring, investigate difficult incidents, and connect signals across systems so problems become explainable and actionable.

04

Application Delivery & Networking

Design and troubleshoot traffic flow, load balancing, DNS, network behavior, and application-delivery paths across infrastructure boundaries.

05

Migrations & Modernization

Plan and execute migrations with dependency analysis, staged cutovers, validation, and service continuity at the center of the work.

06

Resilience & Systems Integration

Improve resilience across high-availability services, email infrastructure, data platforms, and the integrations that hold systems together.

Work

How I approach infrastructure problems.

The problem, what I did, and what changed afterward.

01

Project notes

Protected-Network Infrastructure Migration

Moved production services into a protected network while preserving dependable access and coordinating changes across infrastructure layers.

Approach: Coordinated Linux and application-delivery changes through IP and DNS preparation, policy validation, staged cutovers, and post-change checks.
Outcome: Completed with minimal to zero noticeable user impact.

Stack

Linux
F5 BIG-IP LTM
Palo Alto policy validation
DNS

02

Project notes

Redis Sentinel High Availability for Moodle

Designed and implemented a high-availability Redis layer for a Moodle environment where continuity and predictable recovery mattered.

Approach: Designed the topology, implemented Sentinel-based failover, and validated application behavior and operational recovery paths.
Outcome: Improved service resilience and performance with seamless failover behavior.

Stack

Redis Sentinel
RHEL
Moodle
Monitoring

03

Project notes

Core Systems Migration: CentOS 7 to RHEL 8/9

Migrated critical services from an aging CentOS platform to supported RHEL releases without treating the operating-system change in isolation.

Approach: Assessed dependencies, rebuilt and reconfigured critical systems, coordinated validation, and handled staged cutovers and migration issues.
Outcome: Modernized core systems while maintaining service continuity.

Stack

CentOS 7
RHEL 8/9
Bash
Application validation

Personal Lab

Experiments with a practical point.

Things I build, test, and occasionally break on purpose.

Maintained Project

Monitoring & Automation Environment

An independently managed environment for custom checks, templates, triggers, notification flows, and automation experiments.

Useful automation begins with observable state, explicit failure behavior, and workflows that remain understandable after the demo ends.

Stack

Zabbix
Ansible
CIQ Ascender
Telegram
Python

Prototype

AI-Assisted Operations Investigator

A concept for combining monitoring context with agent-assisted investigation steps and structured operational evidence.

AI assistance is most useful when it narrows investigation and preserves evidence—not when it pretends to replace operational judgment.

Stack

Hermes
Zabbix
Python
AI agents

Maintained Project

Multi-site VPN & Tunnel Operations

Automated VPN/tunnel operations, monitoring, inventory, evidence collection, and AI-assisted investigation.

Turned a messy environment into repeatable, observable, automation-driven operations with evidence.

Stack

Linux
FortiGate
GRE
OpenVPN
Zabbix
CIQ Ascender / Ansible
Telegram Bot API
Google Sheets
Python
Hermes

Experience

Still hands-on, with a wider view each year.

Experience timeline event.
System Engineer
Personal project
Jul 2022 — Present
Troubleshot and automated complex network infrastructure and application-delivery issues across Linux, routing, DNS, firewalls, VPN/GRE tunnels, NAT, and load balancing, using monitoring and end-to-end connectivity evidence to identify root causes and distinguish local failures from broader network or provider issues.
Experience timeline event.
Senior System Engineer
Tel Aviv University
Jul 2022 — Feb 2026
Administered hundreds of production Linux servers, primarily RHEL, while working across application delivery, protected-network migrations, high availability, observability, email infrastructure, automation, cloud, and provisioning workflows.
Experience timeline event.
System Team Leader
Intercloud Ltd.
Sep 2020 — Jul 2022
Built and led a systems team of up to three engineers while remaining hands-on with Linux, web and email systems, troubleshooting, monitoring, and custom infrastructure solutions.
Experience timeline event.
System Administrator
Interhost Networks Ltd.
Nov 2019 — Sep 2020
Administered Linux and Windows hosting infrastructure, expanded monitoring, and resolved server, application, DNS, and network incidents.
Education timeline event.
Cyber Defense Program
John Bryce College
May 2017 — Sep 2019
Graduated with honors