Imagine stepping into a role where every system you manage directly supports teams working on mission-critical, high-impact technology. As a Systems & Networks Administrator , you'll be a key player in managing, securing, and optimizing a diverse IT environment across the organisation.

This is a true "jack of all trades" role, adecuado for someone with deep hands‐on experience across Microsoft 365, AWS, Jira, Windows Server, and network infrastructure, paired with a strong, proactive security mindset. You'll ensure the reliability, scalability, and security of the systems that power day‐to‐day operations and future growth.

What You'll Do Administer, monitor, and optimize Microsoft 365 services (Exchange Online, SharePoint, Teams, Defender, Entra ID, Intune)

Manage and maintain AWS cloud infrastructure , including identity sources, networking, security controls, HPC, SAML, and Route53

Support Windows Server environments , including Active Directory, file services, patching, and backups

Administer and customize Atlassian Jira and Confluence , aligning tools with team workflows and integrations

Support network infrastructure including switches, routers, firewalls, VPNs, site connectivity, and basic SD‐WAN

Design and maintain network layouts and subnet allocations for new and existing facilities

Apply security best practices across systems and networks, supporting compliance, monitoring, and incident response

Troubleshoot complex issues across infrastructure, cloud platforms, networks, and applications





Provide guidance to IT support teams on complex software and hardware issues

Contribute to IT strategy and propose improvements to performance, security, and reliability

Maintain clear documentation of systems, configurations, and processes

What You'll Need Bachelor's degree in IT, Computer Science, or equivalent practical experience

5+ years of experience in systems and network administration

Strong hands‐on experience with Microsoft 365 administration and identity management

Solid knowledge of AWS services, IAM, networking, and security configuration

Strong Windows Server and Active Directory skills

Good understanding of Zero Trust and modern cybersecurity frameworks (e.g. ISO 27001, NIS)

Experience with monitoring tools such as PRTG, SolarWinds, CloudWatch, SIEM, SOC/NOC platforms

Basic to intermediate Linux administration skills

Exposure to DevOps practices and CI/CD tooling

Experience with virtualization and storage technologies (VMware / Hyper‐V)

Strong understanding of OIDC, SAML 2.0, SCIM, MFA , and SaaS integrations

Scripting or automation experience ( PowerShell, Python, Bash )

Solid networking fundamentals ( TCP/IP, VLANs, routing, firewalls, VPNs )

Ability to translate technical challenges into clear solutions for non-technical stakeholders

Desirable Certifications Microsoft 365 Administrator

AWS Associate or Professional

Network+ or CCNA

Security-focused certifications (e.g. Security+)

📌 Network System Specialist (Madrid)
🏢 Strativ Group
📍 Madrid