Windows Systems Administrator

Destinus; Madrid; On-site; EUR 42,000 - 65,000; Full time

Job summary

Destinus is seeking a Windows Systems Administrator to manage and secure a broad range of IT systems across the organisation. You will handle Microsoft 365 services, Windows Server, Active Directory, and related infrastructure with a proactive security mindset.

Join Destinus to support cutting‑edge UAV initiatives and defence collaborations worldwide. You’ll ensure reliability, scalability, and continuous improvement of IT systems, interfaces, and incident response readiness.

Qualifications

• 5+ years in Windows systems administration
• Strong Windows Server & Active Directory skills (DNS, DHCP, Group Policy)
• Experience with Microsoft 365 administration including identity and device management
• PowerShell scripting proficiency
• Experience with virtualization (VMware/Hyper-V) and storage technologies
• Knowledge of OIDC, SAML 2.0, SCIM and MFA integrations with Entra ID
• Understanding of TCP/IP, VLANs, routing, firewalls, VPNs
• Familiarity with monitoring platforms (PRTG, SolarWinds) and SIEM tools
• Knowledge of Zero Trust principles and ISO 27001/NIS2 frameworks

Responsibilities

• Administer, monitor, and optimise Windows and Microsoft 365 environments
• Manage AD, DNS, DHCP, GPOs, and file services; patching and backups
• Configure Intune and Autopilot for device management and compliance baselines
• Administer Jira and Confluence; align with team workflows and integrations
• Apply security best practices, monitor and respond to incidents
• Troubleshoot infrastructure issues across on‑prem and cloud
• Provide guidance to IT support on configurations and complex incidents
• Contribute to IT strategy and system reliability improvements
• Maintain documentation of IT systems, configurations, and processes

Skills

Windows administration

Microsoft 365 administration

Active Directory

PowerShell scripting

Networking fundamentals

Security best practices

SIEM tools

Zero Trust

MFA

SaaS integration

Education

Bachelor's degree in Information Technology or Computer Science

Tools

Jira

Confluence

PRTG

SolarWinds

VMware

Hyper-V

Job description

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 optimisation 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

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 optimisation 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

Requirements

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.