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# Network System Specialist

- **Company:** Strativ Group
- **Location:** Madrid, Spain
- **Contract:** Permanent contract
- **Skills:** Microsoft Windows, Active Directory, Amazon Web Services, Confluence, JIRA, Backup Devices, Bash Shell, Microsoft Online Services, Software as a Service, Continuous Integration, DevOps, Monitoring of Systems, Identity and Access Management, Subnetting, Virtual Private Networks (VPN), Python (Programming Language), Linux System Administration, Windows Servers, Network Architecture, Networking Basics, Routing, Network Administration, OpenID, Paessler Router Traffic Grapher, Windows PowerShell, Zero Trust Network Access, Security Assertion Markup Language (SAML), SAP Sales and Distribution, Microsoft SharePoint, Security Information and Event Management, Systems Integration, TCP/IP, Virtual Local Area Networks, Virtualization Technology, Network Routers, Scripting, Computer Networking Systems, High Performance Computing, Firewalls (Computer Science), Microsoft InTune, Storage Technologies, Information Technology, SolarWinds (Software), Route53, Cloudwatch, Vmware
- **Published:** September 14, 2026
- **Apply:** https://www.buscojobs.com.es/network-system-specialist-en-madrid-ID-370965581

## About the Role

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 *****, 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+) #J-*****-Ljbffr

## Description

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 *****, 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+) #J-*****-Ljbffr


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