Windows Systems Administrator

Destinus; Katwijk; On-site; EUR 70,000 - 90,000; Full time

Job summary

Destinus in Katwijk, Netherlands is seeking a Windows Systems Administrator to manage, secure, and optimize a broad IT estate. You will drive reliability across Microsoft 365, Windows Server, and AD, while embedding a proactive security mindset. The role supports UAV-focused defence operations with global government partners.

You will configure Intune/Autopilot, administer Jira/Confluence, and contribute to IT strategy with a focus on security, scalability, and incident readiness.

Qualifications

• Bachelor’s degree or equivalent in IT/CS.
• 5+ years’ Windows systems administration experience.
• Strong Windows Server and Active Directory skills (DNS, DHCP, Group Policy).
• Proficient Microsoft 365 administration (identity, access, device management).
• PowerShell scripting for automation.
• Experience with virtualization (VMware/Hyper-V) and storage tech.
• Knowledge of MFA, OIDC, SAML 2.0, SCIM, Entra ID integrations.
• Networking basics (TCP/IP, VLANs, VPNs).
• Familiarity with monitoring tools (PRTG, SolarWinds, SIEM).
• Understanding Zero Trust and ISO27001/NIS2 frameworks.

Responsibilities

• Administer and optimize Microsoft 365 services (Exchange Online, SharePoint, Teams, Defender, Entra ID, Intune).
• Maintain Windows Server environments – AD, DNS, DHCP, GPOs, file services, patching, backups.

Skills

Windows administration

PowerShell scripting

Security mindset

Problem solving

Ownership & initiative

Education

Bachelor’s degree in IT or CS

Tools

Microsoft 365

Active Directory

Intune

Entra ID

Autopilot

Exchange Online

SharePoint

Jira

Confluence

VMware

Hyper-V

DFS

DNS

DHCP

PRTG

SIEM

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.