Network System Specialist

Strativ Group; Madrid; Presencial; EUR 40.000 - 60.000; Jornada completa

Descripción de la vacante

A technology services provider in Madrid is seeking a Systems & Networks Administrator to manage and secure systems, optimizing Microsoft 365 and AWS environments. The ideal candidate will have over 5 years of experience in system administration, with strong skills in Windows Server, networking, and security. This role involves troubleshooting, designing network layouts, and ensuring compliance while providing strategic guidance. The position offers an opportunity to work in a dynamic IT atmosphere focused on mission-critical technology.

Formación

• 5+ years of experience in systems and network administration.
• Strong hands‑on experience with Microsoft 365 and AWS.
• Experience with monitoring tools and security frameworks.

Responsabilidades

• Administer and optimize Microsoft 365 services.
• Manage AWS cloud infrastructure and ensure security.
• Support Windows Server environments and Active Directory.

Conocimientos

Microsoft 365 administration

AWS

Windows Server

Networking fundamentals

Scripting (PowerShell, Python, Bash)

Educación

Bachelor’s degree in IT or Computer Science

Herramientas

Atlassian Jira

SolarWinds

PRTG

VMware

Descripción del empleo

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, ideal 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+)