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Sopra Steria

IT consulting, digital services, and transformation

Windows Systems Administrator

System AdministrationConfirmed live in the last 24 hours
Full-timeMadrid, SpainNo salary listedIn-person

About the Job

Requirements

  • 7–10 years of experience administering Microsoft platforms in large corporate environments and critical 24x7 services.
  • Senior/L3-level technical autonomy, with the ability to design solutions and resolve complex incidents.
  • Advanced experience with Windows Server 2016, 2019, 2022, and 2025, including installation, configuration, maintenance, patching, role and service management, registry management, performance management, and advanced troubleshooting.
  • Experience with Active Directory, including domains, forests, organizational units, Group Policy Objects, sites, trusts, administrative delegation, KerBEROS, NTLM, LDAP, SYSVOL, and Netlogon.
  • Experience with Active Directory-integrated DNS, DHCP, name resolution, load balancing, and TCP/IP troubleshooting.
  • Experience with AD DS, DNS, DHCP, WSUS, ADFS, ADCS/PKI, KMS, RDS, and Windows failover clustering where applicable.
  • Experience with Windows disks, volumes, MPIO, SMB, NTFS, ReFS, and shared storage.
  • Experience with VMware vSphere, vCenter, VMware Tools, snapshots, templates, and troubleshooting Windows virtual machines.
  • Advanced PowerShell skills for administration, inventory, validation, patching, and operational automation.
  • Experience with Desired State Configuration, Git, Ansible, Terraform, and CI/CD pipelines.
  • Experience hardening Windows Server and managing security GPOs, Defender, vulnerabilities, certificates, and privileged access.
  • Experience with PAM/PIM, segregated administrative accounts, least privilege, traceability, and secrets management.
  • Experience with WSUS and Microsoft Update, including ring-based deployment, maintenance windows, validation, and update-incident resolution.
  • Ability to design, execute, and document contingency tests for Active Directory, DNS, Netlogon, and SYSVOL.
  • Ability to develop robust scripts with logging, error handling, validation, and documentation.
  • Experience managing L3 incidents, problems, changes, maintenance, obsolescence, and capacity.
  • Experience with ITIL, change management, CAB processes, documentation, evidence collection, and compliance.

Responsibilities

  • Administer, maintain, and evolve the corporate Microsoft platform while ensuring availability, security, performance, and continuity.
  • Install, configure, maintain, patch, and troubleshoot Windows Server environments.
  • Manage Active Directory, DNS, DHCP, Windows services, storage, virtualization, clustering, and related Microsoft infrastructure.
  • Design and execute contingency testing for Active Directory, DNS, Netlogon, and SYSVOL.
  • Manage L3 incidents, problems, changes, maintenance, obsolescence, and capacity.
  • Develop, document, validate, and maintain operational automation scripts and infrastructure processes.

Desired Qualifications

  • Experience with Azure IaaS, Azure Arc, Azure Update Manager, Entra ID, and hybrid administration.

About the Company

Sopra Steria

IT consulting, digital services, and transformation

Sopra Steria provides consulting, digital services and solutions to help large organizations transform their business through technology. Its offerings cover strategy, systems integration, cloud, cyber security, software development, and managed services, designed to be delivered end to end—from assessing needs and designing a plan to implementing and operating IT systems. The company combines deep knowledge of many industries with a collaborative approach to tailor projects to each client and to deliver measurable, sustainable improvements in performance. Differentiators include its European scale (about 51,000 employees across roughly 30 countries), broad scope—from strategy to operation—and emphasis on practical outcomes that help clients stay competitive. The group’s goal is to put digital to work for its clients in a way that creates a positive, more productive future for all stakeholders.

Company size
10,001+
Company stage
IPO
Headquarters
Paris, France
Founded
1968

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