QUENTIN RÜHL

Senior Infrastructure Engineer | Cloud & Security

Experienced IT Engineer with 6+ years in cloud and infrastructure security, successfully leading projects for companies ranging from 10 to 1000+ users.
Led the implementation of innovative security and infrastructure solutions in both cloud and on-premises environments.
Looking to leverage my technical expertise to transition into leadership roles, where I could drive business growth and technology innovation.

About Me

Profile picture
  • Name: Quentin Rühl
  • Date of birth: 27 September 1994
  • Address: Luxembourg
  • Nationality: French
  • Phone: +352 621 799 394
  • Email: quentin.ruhl27@gmail.com

As an experienced IT professional, I’m driven by the constantly evolving nature of technology and the critical role it plays in today's business landscape. I thrive where technical depth meets strategic impact, where technology is not just a support function but a business enabler.

Over the years, I’ve developed versatile expertise across security engineering, system and network administration, cloud infrastructure, and DevOps. Working on diverse and cross-functional projects has strengthened both my technical portfolio and my ability to make decisions that serve broader business goals.

I am eager to continue growing as a leader, embracing new challenges, and applying my evolving skill set to solve complex problems. My focus is on delivering impactful outcomes and driving innovation to align technical solutions with business objectives.

  • Design and Management of Security Systems (SASE, Firewalls, SIEM...) across complex infrastructures.
  • Infrastructure Design and Implementation with a focus on resilience, security, and cost-efficiency in both on-premises and public cloud environments.
  • Applied Cybersecurity solutions that mitigate risks and protect critical business assets.
  • Cloud Security and Computing expertise, including secure migration strategies and infrastructure design in multiple cloud environments (Azure, AWS).
  • DevSecOps integration, embedding security into the DevOps lifecycle to ensure continuous compliance and operational efficiency.
  • Adherence to Security Standards and Best Practices aligning organizational security posture with industry frameworks like ISO 27001 and CIS Controls.
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Experience

Since May 2022 TLI Services Logo

Senior Cloud & Security Engineer

TLI Services for Dennemeyer, Luxembourg
  • Lead the Cloud Team within the Infrastructure Department, driving cloud architecture, security, and migration initiatives across the organization.
  • Architect the Azure environment’s network and security foundation, supporting enterprise-level workload migrations and scalability.
  • Deliver major security infrastructure upgrades, including migration to Prisma Access, 802.1x network access control for all users and office across 20+ countries.
  • Manage the company’s Kubernetes environment using Rancher Prime and AKS, supporting production containerized workloads across multiple teams.
  • Advise cross-functional teams on infrastructure, cloud and security best practices, bridging technical operations with project goals.
  • Automate recurring infrastructure tasks using scripting tools (PowerShell, Ansible), increasing efficiency and reducing manual work.
  • Maintain and secure over 300+ Windows and Linux servers, supporting critical services across global teams.
Oct 2021 - May 2022 Thales Logo

Cloud Security and DevSecOps Consultant

Thales Cyber Solutions (Excellium Services), Luxembourg
  • Integrated Microsoft Sentinel into the company’s Security Operations Center (SOC) offering, expanding Excellium’s cloud-native security services and strengthening value to prospective clients.
  • Participated in client-facing workshops and technical advisory sessions, aligning security strategies with client infrastructure goals.
  • Designed secure cloud architectures for client environments, ensuring regulatory compliance and best practice implementation.
  • Provided cloud and security guidance to internal teams across consulting, SOC, and integration functions, promoting cloud adoption.
  • Embedded security controls into CI/CD pipelines, enhancing software development workflows with real-time vulnerability checks.
Oct 2018 - Oct 2021 Deloitte Luxembourg

Senior Officer - IT Infrastructure & Solutions

Deloitte, Luxembourg
  • Designed and maintained Deloitte Luxembourg's internal security infrastructure, including firewalls, VPNs, reverse proxies, and SIEM platforms.
  • Led the implementation and rollout of Deloitte Luxembourg's Azure cloud environment, establishing network architecture and governance from the ground up.
  • Architected and deployed cloud-native applications using AKS, Azure Functions, and App Services, improving scalability and deployment efficiency.
  • Took technical ownership of security infrastructure operations, ensuring availability, compliance, and performance across hundreds of systems.
  • Collaborated with developers, architects, and business teams to align infrastructure design with operational and strategic goals.
  • Mentored junior engineers on best practices in cloud, infrastructure, and security, contributing to team development and knowledge transfer.
  • Ensured daily operations and continuous improvement of the Windows and Linux server environment.
Feb 2018 - Aug 2018 SmartBuild Asia

CyberSecurity Engineer (Intern)

SmartBuild Asia, Singapore
  • Designed and implemented a company-wide Information Security Management System (ISMS) in line with ISO 27001 standards.
  • Hardened the company's AWS environment, SaaS application portfolio (GSuite, GitHub) and premises, implementing best practices, and network and security controls via Cisco Meraki and JumpCloud.
  • Developed automated backup scripts and basic incident response tools, improving resilience and incident preparedness.
  • Built Python-based tools for data scraping, enabling the automated extraction of business information (contact details, logos, metadata) from websites.
  • Provided cybersecurity awareness training and technical guidance to staff, improving secure practices across teams.

Education

Sep 2017- Feb 2018 Grenoble INP UGA

Master of Science in CyberSecurity

Grenoble INP - Ensimag, Grenoble, France

Double-degree program taught in English, covering a broad spectrum of cybersecurity domains including cryptography, network security, software security and physical security. This multidisciplinary approach provided a comprehensive understanding of the technical and strategic challenges in modern cybersecurity.

Sep 2016 - Jun 2017 Grenoble INP Ensimag

Master of Engineering in Internet, Telecommunications and Software Systems

Grenoble INP - Ensimag, Grenoble, France

Specialization taught with Grenoble INP - Phelma. Focused on programming, systems and networks administration, security and embedded systems.

Sep 2015 - Jun 2016 Grenoble INP Phelma

Bachelor's Degree in Physics, Electronics and Telecommunications

Grenoble INP - Phelma, Grenoble, France

Entered following CPGE as my top-choice engineering school. Specialized in electronics, computer science, and signal processing, with a strong foundation in materials science, quantum physics, and applied mathematics through the common core curriculum.

Sep 2012 - Jul 2015 Lycée Henri Poincaré

CPGE - "Classes préparatoires aux Grandes Écoles" in Physics & Chemistry

Lycée Henri Poincaré, Nancy, France

A highly selective and intensive preparatory program focused on Physics and Chemistry, designed to prepare students for the competitive entrance exams to top French engineering schools. The curriculum also included advanced Mathematics, English, and Literature.

Skills

Professional Skills

  • Leadership & Team Collaboration: Leading cross-functional and technical teams, mentoring junior staff, and fostering a security-first culture.
  • Problem-Solving & Critical Thinking: Diagnosing complex infrastructure challenges, optimizing cloud and on-prem environments, and implementing scalable, high-performance solutions.
  • Technical Storytelling & Communication: Bridging the gap between technical teams and executives by translating complex concepts into actionable insights.
  • Project Management: Driving complex infrastructure projects from planning to execution, mitigating risks, ensuring compliance, and optimizing performance.
  • Stakeholder & Client Engagement: Collaborating with internal teams and external partners to align technology initiatives with business objectives.

Languages

  • French: Native
  • English: C2 (Bulats: 97/100)
  • Spanish: A2 - B1
  • German: A2

Cloud Infrastructure

  • Microsoft Azure: Security, Network, Compute
  • Microsoft 365: Exchange Online, Intune, Defender
  • Prisma Access: SASE, Cloud SWG, CASB
  • AWS: Networking, Compute

Security Systems & Solutions

  • Firewalls: Palo Alto, Checkpoint, Fortinet
  • SIEM: Microsoft Sentinel, QRadar
  • Web Security: Netskope, Palo Alto
  • Reverse Proxy: Nginx, Azure App Gateway
  • PAM: OneIdentity, Vault

Servers & Appliances

  • Windows Server: AD, ADFS, Exchange
  • Linux: Ubuntu, RHEL
  • VPN: Ivanti Secure, Fortinet

Programming & Automation

  • Languages: Python, PowerShell
  • DevOps Tools: Ansible, CI/CD on GitLab and AzureDevops, Terraform
  • Frameworks: Django, DRF