Guillaume Duchesne

Think like an attacker, act like a defender.

About Me

Recently graduated with a Bachelor's degree in Computer Science, Networks & Telecommunications (Security) from HEH Mons, Belgium. I'm passionate about cybersecurity, system hardening, and understanding how attackers think, to build better defenses.

My goal is to become a Cloud Security Engineer. I'm currently building my skills in cloud infrastructure, automation, and security best practices. I have a solid foundation in networking, Linux administration, and offensive security, now I'm focused on deepening my expertise to reach that level.

Open to opportunities

Career Objective

Become an AWS Cloud Security Engineer
Master AWS security services (IAM, GuardDuty, CloudTrail)
Implement zero-trust architectures on AWS
Automate security with Infrastructure as Code (Terraform, Ansible)
Earn AWS Security Specialty & Solutions Architect certifications

My Red side

Penetration Testing
Vulnerability Assessment
Exploitation & Scripting
Reconnaissance & OSINT

My Blue side

System Hardening
Security Monitoring
Network Defense
Cloud Security

Experience

Security Intern – OS Hardening

Feb – May 2026 Smals · Brussels, Belgium

Hardening Windows Server & RHEL VM templates in an enterprise Infrastructure as Code environment.

Auditing baseline VM templates against CIS benchmarks to identify misconfigurations
Developing hardening scripts (PowerShell & Bash) based on CIS/Tenable guidelines
Orchestrating deployments via Ansible for consistent, reproducible hardening
Validating hardening effectiveness through automated audits with Nessus and OpenSCAP
Comparing baseline vs. hardened templates to measure security improvements
Working autonomously while liaising with security and infrastructure teams

Ansible OpenSCAP CIS Benchmarks RHEL 10 PowerShell Python

Freelance IT Consultant (Student Entrepreneur)

Jun 2025 – Jun 2026 Medical Client Project · Brussels, Belgium

Designed and developed a virtual queuing system for a medical clinic to optimize patient flow.
Collaborated with business and medical stakeholders to understand real-world needs and constraints.
Ensured GDPR compliance and integrated secure data handling practices.

Project Management Healthcare IT GDPR System Design

Education

2023 – 2026

Bachelor's in Computer Science, Networking & Telecommunications, Security option

HEH Mons, Belgium

Completed

2020 – 2023

Secondary Education Diploma (IT Specialization)

IPET Nivelles, Belgium

Completed

Certifications

Jr Penetration Tester Fortinet Certified Associate AWS Cloud Foundations AWS Cloud Web App Builder

My Projects

Secure Linux Infrastructure on AWS

Deploying and configuring a secure Linux-based infrastructure on AWS, including NFS/Samba, web hosting, DNS, databases, monitoring, and Bash automation.

LinuxAWSBashNetworking

View on GitHub

Hospital IT Infrastructure

Complete IT infrastructure for a fictional hospital, including Active Directory, DHCP server, VLAN segmentation, and secured web services.

LinuxWindows ServerActive DirectoryNetworking

View on GitHub

Terraform + GitHub Actions – EC2

Automated AWS EC2 provisioning using Terraform with CI/CD pipeline via GitHub Actions for infrastructure-as-code deployment.

TerraformAWSGitHub ActionsCI/CD

View on GitHub

Terraform + Ansible – AWS EC2

Infrastructure provisioning with Terraform and configuration management with Ansible on AWS EC2 instances.

TerraformAnsibleAWSIaC

View on GitHub

GitOps Project

GitOps-based deployment workflow for automated infrastructure and application delivery using Git as the single source of truth.

GitOpsPythonCI/CDAutomation

View on GitHub

Technical Skills

Linux

Python

Bash

Docker

Cybersecurity

Networking

Cisco

Fortinet

Windows Server

Git

Terraform

Ansible

AWS

Get In Touch

Contact Information

duchesne.guil@gmail.com

Rebecq, Belgium