Senior System Engineer

Location: Hesperange, Luxembourg

Department: IT

Reports to: Head of Information Technology

About Global Jet Luxembourg

Global Jet Luxembourg is a leading provider of private aviation services, known for its commitment to excellence, innovation, and discretion. As part of our strategic IT evolution, we are enhancing our existing Azure cloud infrastructure to ensure it is aligned with best practices, scalable, and sustainable for future growth.

Role Overview

We are looking for a resilient and proactive Senior System Engineer to join our IT team. You will take ownership of an existing Microsoft environment (Azure, Microsoft 365 and Servers), assess its current state, and implement improvements to align with industry standards. This role offers the opportunity to make a meaningful impact on the company’s cloud strategy and operations.

Key Responsibilities

• Responsible for managing, maintaining, and optimizing Microsoft-based cloud infrastructures, with a strong focus on Azure and Microsoft 365 (Office 365).
• Contribute to the administration, operational stability, and continuous improvement of the Microsoft environment, including Azure, Microsoft 365, and Active Directory.
• Configure, deploy, and manage Azure resources such as Virtual Machines, Virtual Networks, storage solutions, and application services.
• Deploy, configure, and administer Microsoft 365 services, including Exchange Online, SharePoint Online, Microsoft Teams, and license management.
• Ensure the availability, performance, security, and compliance of Microsoft cloud services and infrastructure. Take over and manage the existing Azure cloud infrastructure.
• Implement and continuously enhance advanced security controls across the entire IT infrastructure to address evolving cyber threats and ensure compliance with regulatory requirements and industry frameworks.
• Assess and optimize Azure architecture, ensuring scalability, security, and performance.
• Manage Azure networking, security, and API Management services.
• Monitor, troubleshoot, and optimize cloud resources while supporting application integration.
• Maintain technical documentation and drive continuous infrastructure improvement.

Job requirements

• 5 - 10 years of experience in cloud engineering or IT infrastructure

Solid understanding of Azure services, including:

Azure DevOps

API Management

Azure automations (including logic apps, functions, …)

Networking (VNETs, NSGs, Firewalls)

Azure virtual Desktop / Windows 365

Azure Policy

• Solid understanding of M365 services, including:

Exchange Online

SharePoint & teams Online

Entra ID

Intune

Defender Family (for endpoint, for cloud, for cloud apps, …)

• Solid understanding of other services, including:

Active directory

Exchange SE

Windows Servers (2019-2025)

SQL Server / MySQL

Linux servers (Debian, CentOS, Ubuntu)

Firewall / Network Virtual Appliance (Fortigate)

• Familiarity with cloud & on-premises security principles and governance.
• Microsoft Azure certifications (AZ-104, AZ-305, AZ-500, AZ-400, MS-100, MS-101, SC-100, SC-200, SC-300…)
• Familiarity with Fortinet security environments, particularly FortiGate and FortiClient EMS, would be considered a valuable asset.
• Familiarity with Linux environments is considered an asset
• Resilient and able to work independently.
• Proactive and solution-oriented mindset.
• Strong communication and collaboration skills.
• Experience with scripting (PowerShell, Bash)
• Infrastructure as Code (Terraform, ARM templates) is a plus.
• Good command of English & French is mandatory.