Systems & Network Engineer
Cybersecurity Engineering Student · Junia ISEN
Currently serving as a Systems & Network Engineer apprentice, with 3 years of hands-on IT infrastructure experience — systems administration, networking, monitoring, backup, virtualization and operational security in production environments.
Production
Enterprise systems
Multi-site
Network infrastructure
3+ years
Field experience
Three years of apprenticeship from helpdesk to systems and network engineering — and nearly four years as a volunteer firefighter. Operational maturity forged in production infrastructure and real emergencies, not just in theory.
I'm Arthur WALLOIS, a Systems & Network Engineer apprentice at BY THE WAY and an engineering student at Junia ISEN in Lille, specializing in cybersecurity, systems and networks.
My path wasn't built in a classroom alone — from helpdesk to systems administration and now network engineering, I design, secure and operate enterprise infrastructure daily: servers, Active Directory, firewalls, VMware, monitoring, backup and endpoint security.
Since October 2022, I've also served as a volunteer firefighter with SDIS 62 in Aire-sur-la-Lys — a commitment that will soon reach four years. Interventions, crisis management and decisions under pressure: experiences that shaped how I handle incidents, outages and security events long before they showed up on a monitoring dashboard.
Helpdesk
Systems & Network Administration
Systems & Network Engineering
Current→ Open to international internship opportunities in 2027.
Oct 2022 – Present · Aire-sur-la-Lys, France
Nearly four years of service alongside my IT career — trained in crisis management, team coordination and decision-making under pressure. Skills that translate directly to incident response and security operations.
From helpdesk to systems administration and network engineering — three years of progressive roles operating real enterprise infrastructure.
BY THE WAY
Current roleSystems and network engineering with focus on operational security, EDR deployment, firewall administration, VMware datacenter management and disaster recovery planning.
BY THE WAY EXPLOITATION
Infrastructure administration covering monitoring, backup, endpoint security, network security appliances and incident management across hybrid environments.
CAPEONI
Level 1/2 support, incident handling, user support, workstation deployment and foundational systems & network troubleshooting.
Operational skills built across security, systems, networking, monitoring and automation.
8 open-source projects on GitHub — from PCAP analysis and malware triage to honeypots, recon and DevSecOps. Built primarily in Go, with Python for automation.
Network analysis, malware triage and DevSecOps — the core of the profile.
PCAP analyzer in pure Go — reconstructs network flows and detects suspicious behavior: beaconing, DNS tunneling and DGA-like domain names. Built for network analysts and SOC workflows.
Static file analyzer for malware triage — hashes, PE/ELF/Mach-O headers, entropy scoring, string extraction, signature rules and IOC cross-referencing.
Static secret scanner for source trees — detects AWS keys, GitHub tokens, JWTs and private keys via regex and Shannon entropy, with SARIF export for CI pipelines.
Defense, reconnaissance and polyvalence across Go and Python.
SSH and HTTP honeypot exposing decoy services, logging intrusion attempts as JSONL and correlating activity by IP — SSH bruteforce, web scans and mixed attack patterns.
Network surface scanner with concurrent TCP scanning, banner grabbing, TLS inspection (certificates, cipher suites, alerts) and service fingerprinting.
Python recon toolkit — subdomain enumeration via crt.sh and wordlists, HTTP probing (status, title, headers) and JSON export.
Python automation and tooling outside the security focus.
Async monitoring bot for Vinted listings — rule-based flip filters, YAML config and Telegram/Discord alerts. Clean async architecture.
Reseller margin calculator and inventory tracker — estimates fees (Vinted, eBay, Depop), ROI, break-even and manages a lightweight JSON inventory.
A simulated SOC environment — monitoring alerts, network topology and incident response in real time.
847
Threats Blocked
12
Active Alerts
99.97%
Network Uptime
3
Incidents Today
Engineering studies focused on computer science, systems, networks and cybersecurity.
Junia ISEN
ESGI
Open to international internship opportunities in 2027.
Open to international internship opportunities in 2027.