Windows Systems Administrator

Quiet Capital; Zuid-Holland; On-site; EUR 55,000 - 75,000; Full time

Job summary

Quiet Capital is looking for a Windows Systems Administrator in Zuid-Holland, Netherlands, to manage IT systems critical to our operations. This role requires expertise in Microsoft 365 and Windows Server with a focus on security and reliability.

As part of your responsibilities, you will administer essential services, support Windows environments, and troubleshoot infrastructure issues. Join us to make a real impact in the aerospace and defense industry.

Qualifications

• 5+ years in Windows systems administration.
• Strong skills in Windows Server management.
• Experience with Microsoft 365 administration.

Responsibilities

• Administer Microsoft 365 services.
• Support Windows Server environments.
• Manage endpoint devices via Intune.

Skills

Windows Server

Active Directory

Microsoft 365

PowerShell

Networking fundamentals

Cybersecurity frameworks

Education

Bachelor’s degree in IT or Computer Science

Tools

VMware

Hyper-V

Atlassian Jira

Confluence

Job description

About The Role

Imagine stepping into a place where every system you touch powers teams that are redefining aerospace and defence. As our Windows Systems Administrator, you will play a key role in managing, securing, and optimising a broad range of IT systems across the organisation. This role requires deep hands-on experience across Microsoft 365, Windows Server, Active Directory, and related infrastructure, while maintaining a proactive security mindset. We are looking for someone who can ensure the reliability, scalability, and security of all systems supporting business operations.

At Destinus, we are revolutionising the defence industry with cutting-edge Unmanned Aerial Vehicles (UAVs). Our innovative technologies are designed to meet the unique demands of modern defence operations, delivering unparalleled speed, precision, and cost-effectiveness. Destinus partners with government agencies and defence organisations worldwide to provide advanced solutions for mission-critical operations. Join us in shaping the future of defence

What You´ll Do

• Administration, monitoring, and optimization of Microsoft 365 services (Exchange Online, SharePoint, Teams, Defender, Entra ID, Intune).
• Support and maintain Windows Server environments - Active Directory, DNS, DHCP, Group Policy, file services, system patching, and backups.
• Manage endpoint devices via Intune and Autopilot, including policy configuration, compliance baselines, and device lifecycle management.
• Administer and customise Atlassian Jira and Confluence, ensuring alignment with team workflows and integrations.
• Apply security best practices across systems, ensuring compliance, monitoring, and incident response readiness.
• Troubleshoot complex infrastructure issues across systems, cloud platforms, and applications.
• Provide consultation to IT support specialists on software and hardware configuration; assist in resolving complex incidents.
• Contribute to IT strategy discussions and propose improvements to enhance performance, security, and reliability of IT systems.
• Maintain accurate documentation of IT systems, configurations, and processes.

What You’ll Need

• Bachelor’s degree in Information Technology, Computer Science, or equivalent experience.
• 5+ years in Windows systems administration with broad Microsoft platform exposure.
• Strong Windows Server and Active Directory skills (DNS, DHCP, Group Policy, DFS, replication).
• Strong Microsoft 365 administration skills, including identity, access control, automation, device management, monitoring, and incident resolution.
• Experience with automation and scripting using PowerShell.
• Understanding of virtualisation solutions (VMware / Hyper‑V) and storage technologies.
• Deep understanding of OIDC, SAML 2.0, SCIM, and MFA flows; experience integrating SaaS platforms with Entra ID.
• Solid understanding of network fundamentals (TCP/IP, VLANs, routing, firewalls, VPNs).
• Familiarity with monitoring platforms (PRTG, SolarWinds, SIEM tools).
• Knowledge of Zero Trust principles and modern cybersecurity frameworks (ISO 27001, ABDO, NIS2).

Certifications (Advantageous)

• Microsoft Certified – Microsoft 365 Administrator Expert or Azure Administrator Associate.
• Security+ or equivalent security‑focused credential.
• MCSA / MCSE (Windows Server) or equivalent demonstrated experience.

Who You Are

You move fast, think sharp, and stay steady when things get complex. You love diving into Windows and Microsoft environments and solving problems across systems without getting boxed in. Ownership motivates you, collaboration fuels you, and security is always on your mind. You communicate clearly, act with integrity, and bring a proactive, improvement‑driven mindset to everything you touch. You want to make real impact in a place where innovation is the everyday baseline.